Divide a fraction, use 2 for 2 times, use 3 for 1 time, and finally get (2/5), what is the original score?
把一个分数约分，用2约了2次，用3约了1次，最后得到(2/5)，原来的分数是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>