The lesson began because Miriel still didn't understand what she'd done wrong.
That realization reached Khan approximately fifteen minutes after the caravan resumed its journey.
He sat across from her in Lillia's carriage, wearing trousers bright enough to qualify as emergency signaling equipment.
The light from the carriage's crystal lamps caught the Lumerian silk and made it shine.
Khan had stopped looking down.
Every time he did, he saw flamingo legs.
Lillia had stopped laughing.
Mostly.
The grimoire sat chained beside her, apparently digesting several blank pages she had fed it as an experiment. Every few minutes, it produced a satisfied clicking noise.
Miriel, meanwhile, was staring at Khan like someone working through a difficult philosophical problem.
Finally, she spoke.
"I still don't understand."
Khan's eyes closed.
There it was.
"What part?"
"The trousers."
His eyes reopened.
Miriel gestured at his legs.
"You said they were worth approximately two and a half gold."
"Lillia said that."
"And I paid one."
"Correct."
"So I saved you one and a half gold."
Lillia immediately became fascinated by her grimoire.
Khan noticed.
Coward.
Miriel continued, "Yet you reacted as though I'd made a terrible purchase."
"You did."
"But I paid less than their value."
"Yes."
"Then it was a good purchase."
"No."
Miriel frowned.
Khan stared at her.
She stared back.
Somewhere between them lay several thousand years of economic development.
Khan leaned back.
The carriage hit a rut.
His back remained mercifully healed.
His dignity did not.
"Miriel, how much money do you think these trousers are worth to me?"
"Two and a half gold."
"No. That's what they're worth to the market."
She waited.
Khan waited for understanding.
None arrived.
He sighed.
"How much would I personally have paid for them if I were given a choice?"
Miriel looked at the aggressively pink trousers.
"One gold?"
"Zero."
She blinked.
"Zero?"
"Zero."
"But they're worth two and a half."
"To someone."
"They're high-quality Lumerian silk."
"To someone."
"The embroidery is enchanted."
Khan slowly turned toward Lillia.
"The what?"
Lillia looked up.
"The flower."
Khan stared at her.
She pointed at his right buttock.
"Minor preservation enchantment. Keeps the thread from fading."
Khan's face went completely still.
"So even time can't destroy it."
"I suppose not."
"Wonderful."
[Garment durability reassessed.]
[Host humiliation: Long-term asset.]
Internet Explorer.
[Present.]
Die quietly.
[Request unsupported.]
Miriel was still thinking.
Khan could practically hear the gears turning.
"So something can have a high market value and still have no value to you."
"Now we're getting somewhere."
"But if you can resell it for more..."
"Can I?"
That stopped her.
Khan spread his hands.
"We're crossing the countryside while fleeing a supernatural storm. I have no contacts, no shop, no reputation and no idea where the nearest clothing market is. And unless you'd like me to finish the journey naked, I also need to wear the asset we're supposedly reselling."
Lillia raised a finger.
"You could probably get one and a half gold fairly quickly."
Khan looked at her.
She lowered the finger.
"Not helping."
"Understood."
Khan returned his attention to Miriel.
"What you did was find a valuable product at a good price."
Miriel brightened.
"That sounds positive."
"It would be, if we wanted the product."
Her expression fell again.
"We did need trousers."
"We needed trousers. We did not need luxury imported trousers."
He pointed down at himself.
"We needed two tubes of cheap cloth and somewhere to put my ass."
Lillia made a noise.
Khan ignored her.
Miriel stared at the pink fabric.
"Then I should have bought cheaper ones."
"Yes."
"Even if they were worse."
"As long as they performed the required function."
"Covering your ass."
Khan paused.
"You're learning."
[Educational progress detected.]
Miriel looked almost pleased.
Then she frowned again.
"But how cheap?"
Khan went silent.
Lillia looked up.
The grimoire stopped chewing.
Even the universe seemed to sense that something important had just happened.
Khan leaned forward.
"How much do you actually know about money?"
Miriel hesitated.
"Quite a lot."
Khan had spent twenty years watching people lie about their competence.
There was a particular pause people made right before claiming expertise they did not have.
Miriel had just made it.
"How many copper coins equal one silver?"
She looked offended.
"I know that."
"Answer."
Her confidence lasted approximately three seconds.
"Fifty?"
Khan stared at her.
Miriel adjusted.
"Eighty."
His stare continued.
"Two hundred?"
Lillia slowly lowered the grimoire.
Khan rubbed his face.
"One hundred."
Miriel nodded as though she'd known this all along.
"Obviously."
"How many silver equal one gold?"
That produced a longer silence.
"One hundred."
"Sometimes."
Her eyes narrowed.
"Sometimes?"
Khan pointed at Lillia.
She took the cue.
"A standard gold crown is generally valued at one hundred silver in major trade cities," Lillia explained. "But actual exchange can vary. Weight, mint, region, silver availability, merchant fees and local coinage all matter. Depending on where you are, 1 gold can effectively trade for somewhere around 100 to 120 silver."
Miriel stared at her.
"Why isn't it fixed?"
Khan almost smiled.
Finally.
A question worth answering.
"Because money isn't mathematics."
She looked at him.
"It's an agreement."
Khan reached into his pouch and took out what remained of his fortune.
Two copper coins.
Three silver.
He placed them on the little table.
It was an unimpressive display.
Particularly for the Incarnation of Avarice.
"100 copper generally gets you 1 silver. Around 100 silver gets you 1 gold under ordinary conditions. Sometimes it takes 110. Sometimes 120. Worse, if you're somewhere isolated, dealing with bad coinage, or negotiating with someone who knows you have no alternative."
Miriel studied the coins.
"So one gold is approximately 10,000 copper?"
"At the cleanest conversion, yes."
She looked down.
Then, slowly, at his trousers.
Khan watched the realization creep up on her.
It was beautiful.
"How much," she asked carefully, "would ordinary trousers cost?"
Khan looked at Lillia.
She answered this time.
"Cheap traveling trousers? Depending on cloth and town, perhaps 20 to 40 silver. Less if used."
Miriel froze.
Khan said nothing.
He wanted this moment to mature naturally.
Her eyes went from Lillia to Khan's legs.
Then to the empty space where his gold coin had once existed.
"Twenty..."
"To forty," Khan supplied.
Miriel's face changed.
"Oh."
There it was.
Khan leaned back.
"Oh."
"I see."
"Do you?"
She winced.
"You wanted me to spend perhaps 30 silver."
"I would have celebrated 20."
"And I spent..."
"1 gold."
Miriel looked ill.
Khan almost felt sympathy.
Almost.
"In other words," he continued, "I gave you enough money to buy several perfectly functional pairs of trousers, and you returned with one luxury pair capable of surviving generations of embarrassment."
[Accurate.]
Miriel looked at his legs again.
"I'm sorry."
Khan waved it away.
"No. We're past that. The gold is gone. This is a post-trade review."
"A what?"
"When you make a bad trade, you don't sit there crying about it. You find out why you made it, so you don't make it twice."
Miriel went quiet.
That answer seemed to land differently.
Lillia noticed too.
Khan picked up one copper coin.
"This is where we're starting."
He placed it in front of Miriel.
"Copper."
Another beside it.
"100 of these make a silver."
He placed a silver coin farther along the table.
"100 silver will usually get you a gold. Depending on where you exchange them, expect anything up to 120."
Miriel nodded.
Khan added the remaining silver coins.
"Now forget conversion for a moment. Coins don't matter until you understand what they buy."
He pointed toward the window.
"That loaf of bread we passed earlier. How much?"
Miriel thought.
"One silver?"
Lillia coughed.
Khan stared at her.
"Are you trying to purchase the bakery?"
Miriel frowned. "Then ten copper."
"Closer."
"Five?"
"Depends on the loaf and region, but now you're thinking in the correct unit."
He pointed toward one of the mounted caravan guards visible through the window.
"A basic meal at an inn?"
Miriel thought harder this time.
"Several copper."
"Good."
"A night's lodging?"
"Silver?"
"Now ask what kind."
She paused.
"Cheap lodging."
"Exactly."
Miriel's brow furrowed.
"A few silver?"
Khan nodded.
Progress.
He could work with this.
"What about a horse?" he asked.
Miriel's confidence returned.
"Four gold."
Lillia tilted her head.
"Not unreasonable for an ordinary riding horse."
Khan nodded.
"Good. And a trained warhorse?"
"Ten?"
"Could be much more."
Miriel absorbed that.
Khan continued.
"Now the important question. Someone offers you an ancient magical dagger for twenty silver."
Miriel immediately looked suspicious.
"What dagger?"
"Hypothetical."
"What rank?"
"Unknown."
"What condition?"
Khan paused.
Then smiled.
"Good."
Miriel noticed.
Her posture straightened slightly.
"You're learning."
She tried not to look pleased.
Failed.
Lillia watched the exchange with quiet amusement.
Khan continued.
"Price isn't value. Price is what someone asks. Market value is what buyers are generally willing to pay. Personal value is what it's worth to you. Those three numbers can be completely different."
Miriel looked at his trousers.
Khan followed her gaze.
"Exactly."
"The asking price was three gold."
"Yes."
"Market value was roughly two and a half."
"According to Lillia."
"I paid one."
"Yes."
"But its value to you was..."
"Approximately twenty silver worth of not being naked."
Miriel nodded slowly.
"So I got an excellent price on the wrong product."
Khan pointed at her.
"There."
The System appeared.
[Financial literacy increased.]
[Miriel has unlocked: Basic Consumer Judgment.]
Khan almost smiled.
Then another line appeared.
[Estimated competency: Below average.]
Baby steps.
[For demons or humans?]
Don't ruin this.
Miriel picked up one of the silver coins.
Her expression had turned thoughtful.
"My father never taught me any of this."
Khan's amusement faded slightly.
"No?"
"We had treasurers."
That explained far too much.
Miriel turned the coin between her fingers.
"If I required something, I told an attendant. If we traveled, expenses were handled by the household. If merchants visited the palace, negotiations were conducted by ministers."
"And when you personally bought something?"
She considered the question.
"I don't think I ever did."
Khan stared at her.
Suddenly the Sunfruit incident made perfect sense.
"You've never bought anything."
"Apparently I bought trousers."
"Don't get proud."
Lillia smiled behind her grimoire.
Miriel ignored her.
"Coins were numbers in reports. Tribute. Salaries. Trade revenue. Military expenditure. I understood that ten thousand gold was more than one thousand gold."
"An inspiring foundation."
"But I never needed to know what a loaf of bread cost."
Khan leaned back.
There it was.
Not stupidity.
Insulation.
Miriel understood money the way a government minister understood grain production: in totals, reports and strategic quantities.
She had never stood in a market wondering whether dinner was worth eight copper or twelve.
Then her kingdom had been taken from her.
And nobody had bothered to include a tutorial.
Khan looked at the demon princess sitting across from him.
18 years old.
SSS mana.
SSS combat potential.
Owner of a conceptual weapon whose value his System couldn't calculate.
Former heir to a throne.
Current net financial competence: aggressively pink trousers.
He sighed.
"We're fixing this."
Miriel looked up.
"Fixing what?"
"You."
Her eyes narrowed.
"My financial education," Khan amended.
"That sounded insulting."
"It was efficient."
[Host has identified a long-term project.]
Khan ignored it.
"From now on, you handle small purchases."
Miriel looked surprised.
"After what happened?"
"Because of what happened."
He tapped the table.
"You'll get a budget. Before buying anything, you estimate what it should cost. You negotiate. Then you tell me why you bought it."
Miriel's suspicion deepened.
"And if I'm wrong?"
"You lose imaginary money until you're capable of losing real money responsibly."
Lillia lowered her book.
"That's actually how my father taught me."
Khan glanced at her.
"Your father sounds sensible."
"He gave me 50 gold at twelve and told me to double it."
Khan's expression changed.
"Did you?"
"Eventually."
"How much did you lose first?"
"38."
Khan nodded.
"Good man."
Miriel stared between them.
"How is losing 38 gold good?"
"Because she remembers it."
Lillia smiled.
"Oh, vividly."
Khan looked down at his trousers.
"So will I."
Miriel followed his gaze.
Her mouth twitched.
Khan caught it.
"Careful."
"I said nothing."
"You didn't need to."
The carriage rolled over another rut.
The enchanted pink silk shimmered in the lamplight.
Khan caught his faint reflection in the opposite window: an eighteen-year-old face, damp hair, a dead trader's eyes and two luminous flamingo legs extending beneath his coat.
He looked like someone had resurrected a hedge fund manager and dressed only the lower half for a spring festival.
Twenty years in financial markets.
Thousands of trades.
Currency crises.
Flash crashes.
Central-bank surprises.
Margin calls.
He had survived all of them.
And somehow the worst stop-loss of his entire career had been executed by an eighteen-year-old demon princess buying trousers.
Khan leaned his head against the carriage wall.
"One gold."
Miriel shifted uncomfortably.
"Technically, you received two and a half gold of value."
He turned his head.
She immediately looked away.
Lillia covered her mouth.
The System appeared.
[Student has begun rationalizing losses.]
Khan stared at Miriel.
Then, despite himself, he smiled.
"Now you're starting to sound like a trader."
Outside, the Goldleaf caravan rolled on east beneath a starless sky.
Inside, a penniless reincarnated forex trader began teaching a dispossessed demon princess how much bread cost.
It wasn't quite how Khan had imagined spending financial independence.
But then again, financial independence had gotten boring.
This, unfortunately, was not.