The denominator of (5/8) is expanded to 32, how much should the numerator be expanded to keep the size of the fraction constant?
(5/8)的分母扩大到32，要使分数大小不变，分子应该扩大到多少．
<gadget id="calculator">32 / 8</gadget>
<output>4</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<result>20</result>