There was no sound in the courtyard except for the crackling sound of an abacus. A group of old fellows were stunned, stupidly looking at the old man with his fingers flying, how could they not believe that he could be so good at calculation.

The old marquis's forehead was also sweating, no matter how much Jiang Xingchen calculated the problem, Tang Tian could quickly get the result, and the speed was a big cut off of himself.

Angry and depressed, the old marquis was quite unhappy in his heart, he actually lost to this old thing who was out of tune in the best calculations.

In fact, the old marquis also discovered the abacus in the old man's hand, but he couldn't figure out why people could calculate the result so quickly.

The old man finished another question, straightened up and looked at the old marquis quietly, with a faint smile on his face. His expression was not too excited, but his heart was refreshed, and this feeling of pleasure was much stronger than before. Look at the shocked look of those old men.

"Artifact, abacus is pretending to be an artifact!" The old man admired in his heart, and he was extremely satisfied with his hard work in the past half a month, otherwise how could it be like this!

"That...... Why don't you stop here today!" Jiang Xingchen hesitated to speak, he really didn't want the old marquis to continue to be abused, the old man's love was no longer very stable, and he was obviously very angry.

"Hehe, take it, your IQ is really not good, admit defeat, let's eat!" the old man laughed, and his true form was suddenly revealed.

"Whoever takes it, keep coming!" The old marquis glared at the old man angrily, turned his head to Jiang Xingchen and said: "I don't believe it, I want to discuss an explanation for my IQ today!"

A group of people covered their mouths. How does the old marquis's words sound the same as the big head and big neck that was fooled in the sketch.

"Old Marquis, calm down. Don't forget it. You can't win!" Jiang Xingchen thought for a while and persuaded: "Your game is not fair in the first place. The old man has the tools?"

When the old man heard this, he shouted loudly, "What do you mean by me holding a tool?" Doesn't he also use pen and paper to calculate, and we all use tools, okay?"

Jiang Xingchen pursed his lips and said, "Old thing, you are embarrassed to say, why don't you also use pen and paper!"

"Ugh!" the old man immediately wilted. With pen and paper, then he will be beaten back to his original shape!

When the old marquis heard this, his eyes never left the abacus. He knew that Tang Tian had used this thing to be so fast! But the question was how to calculate it, it could be so fast.

"This thing is called an abacus, and it is very fast to calculate!" Jiang Xingchen explained.

"Boy. Could it be that you invented it again?" The old marquis didn't look like a powerful thing when he saw that this abacus didn't look like a powerful thing, and then asked: "How can this thing be calculated so fast, several times faster than my calculation with a pen and paper!"

"How many times over? In the previous life, ordinary calculators were not as fast as an abacus master!" Jiang Xingchen said secretly, and said, "Old Marquis, let's still eat, and I'll tell you after eating!"

"Sure enough, I guessed that there was something wrong with what Tang Tian was taking!" the marshal and Huang Shi said secretly, and at the same time sighed that Jiang Xingchen was getting more and more powerful, just such a thing that was not good-looking. It can be regarded as so fast, if this is promoted, it will be very useful.

"Boy, why are you like this, you have said that you are not allowed to dismantle my platform!" the old man shouted. He's just addicted, and he hasn't had enough of it.

"Alright, you're pretending to be enough. The old marquis is really on fire!" Jiang Xingchen waved his hand and beckoned the old marquis: "Go." Eat first!"

"What kind of food are you eating?" the old marquis shook his hand and said loudly, "Tell me about it." What the hell is this thing used for?"

"Hehe, do you want to learn, I'll teach you!" the old man spoke again, once again enjoying the sense of superiority.

Jiang Xingchen is so angry, he said to eat first, you are not finished yet, right? He was angry and put down the sentence: "Okay, you continue." Let's eat!"

The old man's expression fell: "What, boy, you're right, let's eat first!"

"What to eat, you must explain it to me clearly!" The old marquis was like a demon, and clung to the old man.

The old man regretted it so much that he wanted to give himself a mouth: "I've already won, what more mouths!

The final result was that the old man was forced by the old marquis to teach him abacus. Jiang Xingchen and the others went to the lord's mansion and ate hot pot.

"Yes, boy, your craft is really not covered, it is spicy and fragrant, it is so delicious!" several old men were sweating profusely and praising with their thumbs.

In another courtyard, the old man looked depressed, and the aroma of hot pot from next door made him hungry and almost flow out...... But now, he can only explain the use of the abacus to the old marquis.

"Sure enough, there is a price to be paid for pretending to be forced, I'm afraid I can't eat this hot pot, and those old guys won't keep a bite for themselves.

Not long after, when everyone was about to finish a hot pot, the courtyard door was slammed open, and the old marquis ran in with his hands dancing, laughing and said: "Artifact, this abacus is a calculation artifact, too ingenious, too ingenious......

As he spoke, the old marquis came to Jiang Xingchen's side, patted him on the shoulder vigorously, and said, "Seven years ago, you invented simple numbers for tables, and you have made great contributions to the empire's finances, even commerce, agriculture, and other aspects...... Now that you have invented the abacus, you have greatly saved the calculation time, and I want to thank you very much......"

When the marshal saw the old marquis's excited expression, he hurriedly stood up: "Old marquis, calm, calm!"

"Calm, am I calm? Do you know how useful this abacus is, do you know what this means for the imperial finances?"

"Old marquis, the marshal is right! The old man must remember great sorrow and joy, which is not good for his health!" Jiang Xingchen also stood up and said softly: "You do as I say, first take a deep breath, then exhale slowly, relax, and then relax...... Keep taking a deep breath ......"

After doing it several times in a row, the old marquis's excited expression gradually disappeared, and the excitement of the abacus gradually calmed down.

"That's right! Old Marquis, it's just a small invention, there's no need to be so excited!" Jiang Xingchen said with a smile.

"This is not a small invention, and it is not a shame to lose to such an artifact-like calculation tool today!"

"Old thing, what do you mean by losing to a calculator, are you losing to me!" the old man walked into the courtyard and said very unhappily.

The old marquis turned his head and glanced at the old man, and grinned: "Hehe!"

"Hey, I'll go~" The old man jumped so high that he said loudly: "If you don't admit it, you can't do it, everyone watched it just now!"

"Boy, this abacus you invented is really powerful!" the marshal said to Jiang Xingchen.

"I would never have imagined that I could have such a fast calculation speed!" Huang Shi nodded as well.

Next, the two old ladies of the Wei family and the Wu family also admired the abacus invented by Jiang Xingchen.

The old man stood in the back, listening to everyone talking about the abacus invented by Jiang Xingchen, and the refreshment just now was gone. Aren't you saying that winning the old marquis has nothing to do with me?

"What do you mean?" the old man asked angrily.

The old marquis turned around: "Hehe..."

The old man was furious, and then there was another commotion in the yard, although everyone was beating the old man. But in the end, the old man used the spirit of Ah Q, anyway, I won, whether you admit it or not, I just won.

In the end, everyone had no choice but to ignore the old man and chat with each other......

After lunch, after drinking tea for a while, the old marquis is leaving. I thought I would go back and pass on the use of the abacus to everyone.

Jiang Xingchen originally wanted the old marquis to stay for a few more days, but seeing the old marquis's resolute attitude, he had no choice but to give up...... However, before the old marquis left, Jiang Xingchen asked him to convey it to other personnel in the financial department, the abacus can only be used by himself, which is patented and protected by intellectual property rights.

The old marquis really didn't expect this, and after Jiang Xingchen reminded him, he nodded solemnly and agreed.

The old marquis walked with the marshal and Mr. Huang Shi, and the marshal kept muttering that if the old marquis didn't come, he wouldn't move. As a result, I returned before a day, and I didn't drink enough new tea. Mr. Huang Shi also bluntly said that he had lost a lot.

After they left, Jiang Xingchen went to the research institute and found that Nier was indeed able to do mental arithmetic, and her level was much higher than that of the old man. Let him call him a genius, it's only been more than half a month.

But now Nier has a sad face, and she has not been able to do the two geometry problems that Jiang Xingchen left her.

Jiang Xingchen still didn't give her a hint, but just told her that she might as well let everyone solve these two questions......

The two old men of the Wei family and the Wu family stayed for three days, drank enough new tea, and then returned satisfied. Jiang Xingchen was distressed for three days. The two old guys are so good at drinking, they drink two taels of tea in three days.

After sending the old guys away, Jiang Xingchen found the old man: "My new tea should be returned to me!"

"What new tea, I don't know!" The old man had already made up his mind to regret it, how could he return it to Jiang Xingchen.

Jiang Xingchen saw that the old man was a scoundrel, and he was not in a hurry, so he smiled and said, "What's the matter, talking doesn't count, you can't pay it back, right?"

The old man frowned, and said impatiently: "I don't understand what you are talking about!

After finishing speaking, the old man turned around and left, twisting his face and showing a sinister smile: "I still want to take the new tea back from my hand, dream about it, little soul light!"

But as soon as he walked to the door, he heard Jiang Xingchen suddenly say a word, which suddenly made him like a thunderbolt, and his feet on the threshold were retracted......!