A number is (3/8), if 6 is added to the numerator, how much must be added to the denominator to keep the size of the fraction unchanged.
一个数是(3/8)，如果分子加上6，要使分数大小不变，分母必须加上多少．
<gadget id="calculator">3 + 6</gadget>
<output>9</output>

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

<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">24 - 8</gadget>
<output>16</output>

<result>16</result>