A fraction is divided into (1/5), the sum of the original numerator and denominator is 42, what is the original fraction.
一个分数约分后是(1/5)，原分子、分母的和是42，原分数是多少．
<gadget id="calculator">1 + 5</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) / 35</gadget>
<output>1/210 = around 0.004762</output>

<gadget id="calculator">42 * (1/210)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>