For a fraction, the sum of the numerator and denominator is 63. If 17 is added to the denominator, the fraction is (1/3). What is the original fraction?
一个分数，分子和分母的和是63，如果分母加上17，这个分数是(1/3)，原分数是多少．
<gadget id="calculator">63 + 17</gadget>
<output>80</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

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

<gadget id="calculator">80 * (1/4)</gadget>
<output>20</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<gadget id="calculator">60 - 17</gadget>
<output>43</output>

<gadget id="calculator">20 / 43</gadget>
<output>20/43 = around 0.465116</output>

<result>20/43 = around 0.465116</result>