true fraction, whose denominator is 33 greater than the numerator, is reduced to (4/7), what is the original fraction.
一个真分数，它的分母比分子大33，约分后是(4/7)，这个分数原来是多少．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<result>4/7 = around 0.571429</result>