Students do exercises, 12 people in each row can stand 80 rows, if 15 people stand in each row. How many rows can stand.
同学们做操，每行12人可站80行，如果每行站15人．可站多少行．
<gadget id="calculator">12 * 80</gadget>
<output>960</output>

<gadget id="calculator">960 / 15</gadget>
<output>64</output>

<result>64</result>