A/B=2.4, what is the calculation result after expanding A by 3 times and reducing B by 3 times?
A/B=2.4，把A扩大3倍，B缩小3倍后的计算结果是多少．
<gadget id="calculator">2.4 * 3 * 3</gadget>
<output>21.6</output>

<result>21.6</result>