There is a bundle of iron wires, the remaining (1/3) is used for the first time, and 40 meters is used for the second time, and the full length (1/2) is left at this time. What is the total length of the bundle of iron wires in meters?
有一捆铁丝，第一次用去的是余下的(1/3)，第二次用去40米，这时还剩全长(1/2)，这捆铁丝原来共长多少米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

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

<gadget id="calculator">1 - (1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 / (1/4)</gadget>
<output>160</output>

<result>160</result>