(2/5) molecules increase 6． To keep the size of the fraction constant. How many times should the denominator be enlarged.
(2/5)的分子增加6．要使分数的大小不变．分母应扩大多少倍．
<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<result>4</result>