If the former term of 5:8 is enlarged to 3 times of the original, how much should the latter term be increased to keep the ratio constant.
如果5：8的前项扩大到原来的3倍，要使比值不变，后项应增加多少．
<gadget id="calculator">24 - 8</gadget>
<output>16</output>

<result>16</result>