A bundle of wires is 200 meters long, and after some of them are used up, there is still (2/5). How much more rice was used than left over?
一捆电线长200米，用去一些后，还剩下(2/5)．用去的比剩下的多多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">200 * (1/5)</gadget>
<output>40</output>

<result>40</result>