There is a fraction. The difference between its numerator and denominator is 42. After simplifying this fraction, it is (1/4). What is this fraction?
有一个分数，它的分子与分母的差是42，把这个分数化简后是(1/4)，这个分数是多少．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">42 / 3</gadget>
<output>14</output>

<gadget id="calculator">14 + 42</gadget>
<output>56</output>

<gadget id="calculator">42 / 3 / 56</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>