How much more is (2/5) than (2/5) of it?
(2/5)比它的(2/5)多多少？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * (2/5)</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">(2/5) - (4/25)</gadget>
<output>6/25 = around 0.24</output>

<result>6/25 = around 0.24</result>