Multiply the numerator of (3/8) by 4, how much should be added to the denominator to keep the fraction value unchanged
给(3/8)的分子乘4，要使分数值不变，分母应加上多少
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">32 - 8</gadget>
<output>24</output>

<result>24</result>