Mathematicians, engineers and chemists pay attention to different aspects of the same problem. Mathematicians see other people's methods to solve this problem. In his mind, he thinks it is not an unsolvable mathematical problem. He is a mathematician. Since he has a solution, he doesn't care. So when his sheets caught fire, he thought I should get used to solving problems with a solution, but he forgot that this was real life, not the calculation of exercises. Objectively speaking, this is a joke played by mathematicians who are too obsessed with mathematics and forget life. Just like scientists eat ink, I wonder if this means it.