On the May 19th installment of JTBC's 'Going to School', actress Yoon So Hee proved her smarts in high school, especially her impressive math skills, which is no surprise considering she goes to one of the top science and engineering schools in Korea, KAIST.

The teacher was especially happy at her prowess, saying, "How does it feel studying after a long time for the transfer students? Studying is still better than working, right?"

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Hong Jin Kyung disagreed, saying, "I think working is a whole lot easier," but younger transfer student, Yoon So Hee, said, "I like studying better. After entering society, I've come to realize how precious the bubble of school is." Hong Jin Kyung said, "If you say it like that, then I look bad," making everyone laugh. 

Do you prefer working or studying?