The students do morning exercises, there are 18 people in each row, and they can stand for 20 rows. If there are 24 people in each row, how many rows can they stand?
同学们做早操，每行18人，正好可以站20行．如果每行排24人，可以站多少行？
<gadget id="calculator">20 / 24</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">18 * (5/6)</gadget>
<output>15</output>

<result>15</result>