After a wire is folded in half 4 times, each piece is 5 cm long, what is the original length of the wire in cm?
一根铁丝对折4次后，每段长5厘米，这根铁丝原来长多少厘米．
<gadget id="calculator">5 * 16</gadget>
<output>80</output>

<result>80</result>