Divide a fraction, once with 2, twice with 3, and once with 5, the score obtained is (4/5), what is the original score?
把一个分数约分，用2约了一次，用3约了两次，用5约了一次，得到的分数是(4/5)，原来这个分数是多少？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>