At the school sports meeting, among the students who participated in the group gymnastics performance, there were 570 boys and 360 girls, and 30 people stood in each row. How many more rows did boys stand than girls?
学校运动会上，参加团体操表演的同学中，男生有570人，女生有360人，每行站30人，男生比女生多站几行？
<gadget id="calculator">570 - 360</gadget>
<output>210</output>

<gadget id="calculator">210 / 30</gadget>
<output>7</output>

<result>7</result>