Teacher Zhang needs a 32 cm long aluminum bar to do the experiment. He cut off half of an aluminum strip, and then cut off 4 cm, just in line with the experimental requirements. How long is the original aluminum strip?
张老师需要一根长32厘米的铝条做实验．他将一根铝条剪去一半，再剪去4厘米，正好符合实验要求．原来铝条有多长？
<gadget id="calculator">32 + 4</gadget>
<output>36</output>

<gadget id="calculator">36 * 2</gadget>
<output>72</output>

<result>72</result>