The school holds a group gymnastics performance. If there are 25 people in each row, there should be 16 rows. If there are 20 people in each row, how many rows are there?
学校举行团体操表演，如果每列25人，要排16列．如果每列20人，要排多少列？
<gadget id="calculator">16 / 20</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">25 * (4/5)</gadget>
<output>20</output>

<result>20</result>