Studying is so much harder than exercising if you have no motivation. And Jiang He doesn't have a lot of motivation to study. She even had the same "We have calculators!" response when told it would help her in life. Well, I think learning at least grade school level education is necessary in the real world. But it is hard to do that when you're already an adult.
Xu Qing's been a bit too cheeky lately. Jiang He should look for ways to teach him a lesson, preferably one that he wouldn't take as a reward.