A piece of wood is (1/2) meter long, if (1/4) of it is cut off for the first time, and (1/5) meter is cut off for the second time, how many meters will the wood be reduced?
一根木料长(1/2)米，第一次截去它的(1/4)，第二次截去(1/5)米，这根木料减少多少米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) * (1/4)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/8) + (1/5)</gadget>
<output>13/40 = around 0.325</output>

<result>13/40 = around 0.325</result>