Add 5 to the numerator of (1/5), how much should the denominator be multiplied to keep the size of the fraction constant
(1/5)的分子加上5，要使分数的大小不变，分母应乘多少
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<result>6</result>