A piece of iron wire is used up half, and then the remaining half is used. At this time, there are 8 meters left. How many meters is the length of this iron wire?
一根铁丝用去一半后再用去剩下的一半，这时剩下8米，原来这根铁丝长多少米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">8 / (1/2) / (1/2)</gadget>
<output>32</output>

<result>32</result>