The school holds a group gymnastics performance. If there are 30 people in each row, there should be 20 rows. How many rows are there if there are 25 people in each row?
学校举行团体操表演，如果每列30人，要排20列．如果每列25人，要排多少列？
<gadget id="calculator">20 / 25</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">30 * (4/5)</gadget>
<output>24</output>

<result>24</result>