It is known that the sum of two different unit fractions is (1/48), what is the minimum value of their difference.
已知两个不同的单位分数之和是(1/48)，它们之差的最小值是多少．
<gadget id="calculator">1 / 84</gadget>
<output>1/84 = around 0.011905</output>

<gadget id="calculator">1 / 112</gadget>
<output>1/112 = around 0.008929</output>

<gadget id="calculator">(1/84) - (1/112)</gadget>
<output>1/336 = around 0.002976</output>

<result>1/336 = around 0.002976</result>