The numerator of (6/7) is increased by 24, how much should the denominator be increased to keep the size of the fraction unchanged.
(6/7)的分子增加24，要使分数大小不变，分母应增加多少．
<gadget id="calculator">7 * 5</gadget>
<output>35</output>

<gadget id="calculator">35 - 7</gadget>
<output>28</output>

<result>28</result>