A bundle of iron wire, cut off (2/5) for the first time, and cut off (1/4) of the first time for the second time, leaving 8 meters left, how many meters is the total length?
一捆铁丝，第一次剪去(2/5)，第二次剪去第一次的(1/4)，还剩8米，共长多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) * (1/4)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (2/5) - (1/10)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">8 / (1/2)</gadget>
<output>16</output>

<result>16</result>