A wire is (7/8) meters long, if (2/5) of it is cut off, how many meters are cut off?
一根铁丝长(7/8)米，剪去它的(2/5)，剪去了多少米？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

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

<gadget id="calculator">(7/8) * (2/5)</gadget>
<output>7/20 = around 0.35</output>

<result>7/20 = around 0.35</result>