3 cats catch 3 mice in 3 days, how many mice can 9 cats catch in 9 days?
3只猫3天捉3只老鼠，9只猫9天捉多少只老鼠．
<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">3 * 3 * 3</gadget>
<output>27</output>

<result>27</result>