The sum of the numerator and denominator of a fraction is 400, the value of the fraction after division is (5/3), what is the original fraction.
一个分数的分子、分母和是400，约分后分数值是(5/3)，原来的分数是多少．
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">400 * (3/8)</gadget>
<output>150</output>

<gadget id="calculator">(5/8) / 150</gadget>
<output>1/240 = around 0.004167</output>

<gadget id="calculator">400 * (1/240)</gadget>
<output>5/3 = around 1.666667</output>

<result>5/3 = around 1.666667</result>