For an internationally famous China, a woman once went to buy cotton. Hua is solving a math problem. How much does the lady say it costs to pack cotton? However, diligent Hua didn't hear it, so she answered the calculated answer. The woman screamed, "Why is it so expensive?" At this time, Hua knew that someone was coming to buy cotton and said the price. The woman bought a bag of cotton and left. When Hua was about to sit down and continue to calculate, he found that the toilet paper that had just been calculated was taken away by the woman. This time, Hua was anxious to catch up desperately. A master Huang Bao met Professor Hua, a modern mathematician in China who enjoys a high reputation in the world.
I let him take the bus (because they knew each other) and finally caught up with him. Hua said shyly, "Aunt, please … please give me back the toilet paper." The woman said angrily, "I paid for it, but it wasn't from you." Hua was in a hurry and said, "How about this! I paid for it. " When Hua reached for the money, the woman seemed to be moved by the child! He not only asked for money, but also returned the toilet paper to Hua. At this time, HuaCai slightly relieved, after returning home, he calculated again. ...