C291 (20)

"Hey, got a question you don't understand?" Mr. Wei thought to himself. Lingling was someone who grew up in a completely different era, and expecting her to master high school material in such a short time seemed a bit much.

"Mr. Wei, I..." Lingling was about to say she didn't have any questions, but her better judgment stopped her. "Mr. Wei, I don't get this one."

She pointed to a math problem