(2/5) of a number is exactly (8/25), what is this number?
一个数的(2/5)正好是(8/25)，这个数是多少．
<gadget id="calculator">8 / 25</gadget>
<output>8/25 = around 0.32</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(8/25) / (2/5)</gadget>
<output>4/5 = around 0.8</output>

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