The third grade students do exercises. If there are 20 people in each row, they need to stand in 12 rows. If they stand in 8 rows, how many people should stand in each row?
三年级同学做操，如果每排站20人，需要站12排，如果站成8排，每排要站几人？
<gadget id="calculator">12 * 20</gadget>
<output>240</output>

<gadget id="calculator">240 / 8</gadget>
<output>30</output>

<result>30</result>