The primary school performing arts in the Economic Development Zone originally lined up 25 rows with 24 people in each row. After the formation changed, 20 people stood in each row. How many rows should they stand in?
经济开发区小学表演艺术操，原来排成25列，每列24人，队形变化后，每列站20人，要站多少列？
<gadget id="calculator">24 / 20</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">25 * (6/5)</gadget>
<output>30</output>

<result>30</result>