1796 One day, at the University of G? ttingen in Germany, a 19-year-old young man was extremely talented in mathematics. After dinner, he began to do three routine math problems assigned to him by his tutor. As usual, the first two topics were successfully completed in two hours. The third question, written on a small piece of paper, is to make a positive 17 polygon with only compasses and an uncalibrated ruler. The more young people do, the more tired they feel. Difficulties aroused the young people's fighting spirit: I must do it! He picked up compasses and rulers, drew on paper, and tried to solve the problem with some unconventional ideas. Finally, when there was a glimmer of light outside the window, the young man breathed a sigh of relief, and he finally made this difficult problem! After the homework was handed over to the tutor, the tutor was shocked at once. He said to the young man in a trembling voice, "did you really do this yourself?" Do you know that you have solved a math unsolved case with a history of more than 2000 years? Archimedes didn't solve it, Newton didn't solve it, and you solved it overnight! You are a genius! I have been studying this difficult problem recently. When I assigned you a topic yesterday, I accidentally put a small note with this topic in the topic for you. " Many years later, when the young man recalled this scene, he always said, "If someone told me that this is a math problem with a history of more than 2,000 years, I could not solve it for one night." This young man is Gauss, the prince of mathematics. Some things can often be done better when we don't know how difficult it is. This is what people often say: ignorance and fearlessness. Everyone's inner energy is huge, but he is scared by himself.