A wire is 10 meters long, first use (1/5) of it, and then use (1/5) meter, how many meters is this wire shorter than the original one?
一根电线长10米，先用去它的(1/5)，再用去(1/5)米，这根电线比原来短了多少米．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">10 * (1/5)</gadget>
<output>2</output>

<gadget id="calculator">2 + (1/5)</gadget>
<output>11/5 = around 2.2</output>

<result>11/5 = around 2.2</result>