Students do radio exercises, 20 people stand in each row, exactly 18 rows. If there are 24 people standing in each row, how many rows can they stand in? (Solve with ratio)
同学们做广播操，每行站20人，正好站18行．如果每行站24人，可以站多少行？(用比例解)
<gadget id="calculator">20 * 18</gadget>
<output>360</output>

<gadget id="calculator">360 / 24</gadget>
<output>15</output>

<result>15</result>