fraction is reduced to (9/4), and the sum of the numerator and denominator is 117. What is the fraction?
一个分数约简后是(9/4)，分子与分母的和是117，这个分数是多少．
<gadget id="calculator">9 + 4</gadget>
<output>13</output>

<gadget id="calculator">117 / 13</gadget>
<output>9</output>

<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<gadget id="calculator">117 / 13 / 36</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">9 * (1/4)</gadget>
<output>9/4 = around 2.25</output>

<result>9/4 = around 2.25</result>