Divide a fraction once with 2, once with 3, and once with 5, and the final result is (1/2), what is the original fraction.
把一个分数用2约分一次，用3约了一次，用5约了一次，得到的最后结果是(1/2)，这个分数原来是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>