The numerator of (5/12) is enlarged by 3 times, how much should be added to the denominator to keep the value of the fraction unchanged?
(5/12)的分子扩大3倍，要使分数的分值不变，分母应加上多少
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">36 - 12</gadget>
<output>24</output>

<result>24</result>