Students do exercises, 18 people stand in each row, exactly 20 rows. If there are 24 rows, how many people should stand in each row? (Solve with ratio)
同学们做操，每行站18人，正好站20行．如果要站24行，每行应站多少人？(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>