The numerator of (24/28) is reduced by 18. To keep the size of this fraction constant, what should the denominator be?
(24/28)的分子减少18，要使这个分数的大小不变，分母应该变成多少
<gadget id="calculator">24 - 18</gadget>
<output>6</output>

<gadget id="calculator">24 / 6</gadget>
<output>4</output>

<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<result>7</result>