You can find a teacher with a teaching qualification certificate to study during the holiday, and don't go to a cram school casually, because all teachers are not competent for their work and skills are not good. If you don't want to go to cram school, you can usually talk to a math teacher at school. Multiplication is actually very simple. Let him teach you some formulas and learn methods. But what you don't like to hear is how you learned it in primary school. I can't multiply in the third grade. You shouldn't. I really didn't realize the method. I just started to learn in a down-to-earth manner from the first grade of primary school, and I am not tired after learning well. If you didn't study hard before, you will suffer now.