There are 25 rows of seats in the auditorium, each row has 30 seats. If there are 680 people sitting in the auditorium, then there are at least as many rows as the number of people sitting.
礼堂里有座位25排，每排有30个座位．如果有680人在礼堂就坐，那么至少有多少排坐的人数同样多．
<result>4</result>