The numerator of the fraction is increased by 9 times, how many times should the denominator be enlarged to keep the size of the fraction unchanged?
分数的分子增大了9倍，要使分数的大小不变，分母应扩大到原来的多少倍．
<gadget id="calculator">1 + 9</gadget>
<output>10</output>

<result>10</result>