rope is folded in half three times in a row, and the length of each fold is 1 meter. How long is the rope in meters?
有一根绳子，连续对折3次后，量得每折绳子长1米．这根绳子原来一共长多少米．
<gadget id="calculator">1 * 8</gadget>
<output>8</output>

<result>8</result>