Xiao Rui thought about it for a while, if it was written in too much detail, wouldn't it be a little challenging? Will it make Feng Gongzi feel that he looks down on others? People also stationed troops in Lingnan to fight, and a lot of common sense is understood.

Therefore, Xiao Rui only gave brief data such as the number of combatants, the number of days of battle, the number of people killed, the standard of bereavement, and the standard of meritorious service.

Feng Zhidai took a look at it and immediately smiled, "Didn't you say that the amount of calculation is very large?" For this little thing, I don't need to calculate how long it is, let alone a class, I can calculate it clearly in a quarter of an hour. ”

Zhao Deyan reminded: "Don't blow nonsense, it's useless to calculate quickly, you have to make these people understand." ”

Feng Zhidai made an OK gesture, and then began to speak.

Xiao Rui was dumbfounded, and turned his head to look at Zhao Deyan, "When did this thing learn this gesture?" ”

Zhao Deyan said with a smile: "You don't know, this product is an idol for you, not only calligraphy, painting and math to learn, but even the tone and gestures of your usual speech, he has learned a lot." ”

Xiao Rui couldn't laugh or cry, "Then do you know what my gesture means?" ”

"Doesn't that mean reassuring and no problem?" Zhao Deyan replied lightly.

"Then why does this gesture mean this?"

Forehead......

Zhao Deyan can't answer this question.

Shaking his head, "Didn't you say that?" Besides, everyone is used to it, as long as they understand what you mean. ”

I'm ......

"Hurry up and listen to the class, and see if the teaching level of this talented Feng is qualified to be a Mr. Count."

I saw Feng Zhidai smiling and sweeping over all the students, the oldest of them was Fang Yiai, and the youngest was Princess Changle, oh, by the way, and Xiao Rui's son Xiao Ping'an didn't count.

Then the 'quasi' arithmetic gentleman confidently straightened his chest, and said in his heart that as long as these people know how to add one plus one equals two, I promise to explain it to them clearly.

"Everyone's survival is nothing more than four things: food, clothing, and shelter. To fight a large army is to gather a large number of people together to fight and fight, and at the same time, the imperial court is responsible for their food, clothing, and housing expenses......"

Zhao Deyan nodded, "Yes, the outline leader, he is a material for a teacher." ”

Xiao Rui also smiled, and said in his heart that I had found the right person, if I told Xiao Changle, maybe she would think I was lying to her.

I only heard Feng Zhidai continue to speak: "Before the soldiers and horses move the grain and grass, the grain and grass will cost the most in a big war. That is, eating. This can be divided into what people eat, and what horses and livestock eat, and livestock includes war horses, mules and horses, etc. ”

"In the last war, roughly calculated, Datang invested 200,000 people and 100,000 livestock. So how much grain and grass do you need to prepare? ”

"We can calculate how much food a person eats in a day. At the current price of grain, one penny can buy two flax cakes. It is enough for an adult to eat two at a meal and drink some soup. The army marched, and each man had two meals a day. ”

In this way, a person spends two cents a day. How much does it cost to eat a day for an army of 200,000? ”

……

Hearing this, Xiao Rui and Zhao Deyan were dumbfounded at the same time, looked at each other, and the two couldn't cry or laugh.

Is this really the fifth in the world, the son of the Feng family, who is all-round in civil and military affairs? Are you sure you're not a pampered gentleman who hasn't been out of the house?

Zhao Deyan pressed Xiao Rui, who wanted to interrupt the other party, and whispered: "Let's listen to him, we are recruiting Mr. Teach, how can we do it if we don't let people finish speaking?" ”

Xiao Rui covered his eyes, and said in his heart that if he miscalculated and let Xiao Changle misunderstand, how can I fix it?

Turning his head to look at all the students who were listening to the class, they all nodded in agreement, there is nothing wrong with this accounting, one person eats two flax cakes at a time, he will definitely be able to eat, and he spends two pennies a day to eat, which is enough.

"So, how much does it cost to eat a day for an army of 200,000? That's 200,000 taels of money, 400,000 yuan! ”

"How much is that? According to the ratio of copper coins and silver set by the government, one tael of silver is a thousand copper coins, and 400,000 wen is how many taels of silver? Who's going to do the math? ”

Good guys, this is really a material for being a teacher, and you know how to motivate students to interact?

Zhao Deyan had already begun to praise in a whisper, and Xiao Rui's face became even darker.

Li Chengqian raised his hand and stood up, "I'll count it." ”

After speaking, he found the calculation chip in the school, and chanted while fiddling: "One thousand wen is one tael, ten thousand wen is ten taels, one hundred thousand wen is one hundred taels, and four hundred thousand wen is, that is—four hundred taels!" ”

"Sir, it's been calculated, 400,000 Wen is a total of 400,000 taels of silver."

Feng Zhidai praised with a smile: "Yes, it's right." That is to say, an army of 200,000 needs 400 taels of silver to eat a day. ”

Fang Yiai muttered: "Amazing, the calculation is so fast, I just counted ten taels." ”

Burst...... Is there any brainless touting of this? Xiao Rui wanted to vomit blood.

Feng Zhidai continued: "Then let's calculate how much the livestock eats and drinks, and how much a meal of grain and grass is, I don't know very well. But what is known is that no one will eat better than livestock, because grain is more expensive than grass. So just a rough estimate. According to a livestock, the cost of eating and drinking a day is half of a person's, that is, a mule and horse pay a penny a day. ”

"So with the same calculation, how much does it cost to eat and drink a day for 100,000 mules and horses? One hundred taels! Right? ”

Yang Zhengdao, Li Chengqian, and Xiaochang Lego shouted: "Yes, one hundred taels." ”

Niu Xiaohu is still calculating, and Fang Yiai is completely stuck, "What, sir, can you calculate it in detail?" ”

Forehead......

"Haha, it's okay, it's okay, then we'll do the math carefully." Feng Zhidai kept in mind the original promise and needed to make every student understand, so he patiently recalculated it himself.

It wasn't until Fang Yiai also smiled and nodded to make it clear that he continued to speak.

"Okay, now 200,000 troops, 100,000 mules and horses, how much does it cost to eat in a day? Four hundred taels plus one hundred taels, that is, five hundred taels. ”

"So, how much did the last war cost in total after a hundred days? That is, one hundred and five hundred taels, who will calculate how much it is? ”

Xiao Changle raised his hand excitedly, "I'll come, I'll come, this is easy to calculate, five hundred taels multiplied by one hundred, it's very simple, fifty thousand taels!" ”

Feng Zhidai praised: "What a smart little princess, she turned out to be a verbal calculation." That's right, exactly fifty thousand taels. ”

"In other words, in the last war, the money spent on grain and grass was 50,000 taels of silver."

"Now that you've figured out the grain and grass, what's next? Food, clothing, shelter, it's time to dress and stay......"

Feng Zhidai talked endlessly, and the students listened to it with relish and fascination.

Xiao Rui and Zhao Deyan seemed to have been refreshed their cognition, Zhao Deyan asked in a low voice: "Master Hou, I know how much the Turkic expenses were last time, how much was Datang?" Don't talk about anything else, just talk about grain and grass. ”

"How much?" Xiao Rui said with a dark face: "If the emperor believes him to settle accounts like this, it is estimated that he dares to start a war with the four Turks at the same time." ”

Four? That is, 200,000 taels? Zhao Deyan sighed, the Turks are similar.

Xiao Rui stretched out three fingers, "No, but grain and grass, we spent 300,000 taels!" That's the Mr. Arithmetic you found me? That's it? ”

Forehead......

Zhao Deyan's old face turned red, and he lowered his voice and explained: "If you simply say counting, he didn't make a mistake. He just doesn't know much about military affairs and reality. ”

So? How do you want to quibble?

"Therefore, he is only suitable to be a math teacher, not a strategist in the army." Zhao Deyan spread his hands.

Xiao Rui: ......

It seems that there is nothing wrong with it!