For a fraction, the sum of the numerator and denominator is 122. If 19 is subtracted from both the numerator and the denominator, the fraction will be (1/5). What is the original fraction?
一个分数，分子分母的和为122，如果分子、分母都减去19，约分后为(1/5)，原来的那个分数是多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 122</gadget>
<output>122/5 = around 24.4</output>

<gadget id="calculator">(1/5) * 19</gadget>
<output>19/5 = around 3.8</output>

<gadget id="calculator">(122/5) - (19/5)</gadget>
<output>103/5 = around 20.6</output>

<gadget id="calculator">19 + (103/5)</gadget>
<output>198/5 = around 39.6</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(198/5) / (6/5)</gadget>
<output>33</output>

<gadget id="calculator">122 - 33</gadget>
<output>89</output>

<gadget id="calculator">(198/5) / (6/5) / 89</gadget>
<output>33/89 = around 0.370787</output>

<result>33/89 = around 0.370787</result>