Zhanqi School organizes students to participate in the "July 1st" group gymnastics performance, with 25 people standing in each row, and 36 rows; if each row stands 30 people, how many rows should they stand in? (Solve with ratio)
战旗学校组织学生参加庆"七•一"团体操表演，每排站25人，要站36排；如果每排站30人，该站多少排？(用比例解)
<gadget id="calculator">25 * 36</gadget>
<output>900</output>

<gadget id="calculator">900 / 30</gadget>
<output>30</output>

<result>30</result>