Add 5 to the numerator of (5/8), how much should the denominator be multiplied to keep the fraction constant?
(5/8)的分子加上5，要使分数的大小不变，分母应乘以多少
<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<gadget id="calculator">10 / 5</gadget>
<output>2</output>

<result>2</result>