4 kittens catch mice, and catch 4 small mice in 4 hours. According to their skills, how many small cats should be killed if they want to catch 24 small mice in 24 hours.
4只小猫捉老鼠，4小时捉到4只小老鼠，按照它们这样的本领，要在24小时捉到24只小老鼠，应该去多少只小花猫．
<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">24 / 6</gadget>
<output>4</output>

<result>4</result>