If 5 cats catch 5 mice in 5 days, how many mice will 100 cats catch in 100 days?
5只猫5天抓5只老鼠，照这样计算，100只猫100天抓多少只老鼠．
<gadget id="calculator">100 / 5</gadget>
<output>20</output>

<gadget id="calculator">5 * 20 * 20</gadget>
<output>2_000</output>

<result>2_000</result>