The simplest fraction of a fraction is (3/5), the denominator of the original fraction is 8 greater than the numerator, what is the numerator of the original fraction.
一个分数的最简分数是(3/5)，原分数的分母比分子大8，原来分数的分子是多少．
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

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

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>