It is known that 10 is added to the numerator of (5/12), how much should be added to the denominator to keep the size of the fraction unchanged.
已知(5/12)的分子加上10，要使分数的大小不变，分母应加上多少．
<gadget id="calculator">5 + 10</gadget>
<output>15</output>

<gadget id="calculator">15 / 5</gadget>
<output>3</output>

<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">36 - 12</gadget>
<output>24</output>

<result>24</result>