The denominator of (3/4) is expanded by 3 times, how much should the numerator increase
(3/4)的分母扩大3倍，分子应该增加多少
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">9 - 3</gadget>
<output>6</output>

<result>6</result>