There is a rope that is folded in half three times in a row, and the length of each fold is 4 meters. What is the length of the rope in meters?
有一根绳子，连续对折3次，量得每折长4米，这根绳子长多少米．
<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<result>32</result>