Add 2 to the numerator of the fraction (1/10), how much should the denominator be multiplied to keep the size of the fraction constant
给分数(1/10)的分子加上2，要使分数的大小不变，分母应乘多少
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<result>3</result>