Teacher Hui was doing an experiment in science class. He cut off half of an iron wire, and then cut off 4 cm. At this time, the length of the iron wire was exactly 32 cm, which met the requirements of the experiment. How long is the wire in centimeters?
惠老师在科学课上做实验，他将一根铁丝剪去一半，再剪去4厘米，这时铁丝正好长32厘米，符合实验要求．原来铁丝长多少厘米．
<gadget id="calculator">4 + 32</gadget>
<output>36</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">36 / (1/2)</gadget>
<output>72</output>

<result>72</result>