A monkey was playing on a tree, and suddenly saw a moon in the water, so it found a rope and was going to catch the moon. It folds the rope in half and then in half, and finally twists it into a 6-meter-long rope, which just reaches the water surface. How long is this rope originally?
有一只猴子在树上玩，突然看见水里面有一个月亮，它就找了一根绳子，准备去捞月亮．它将这根绳子对折再对折，最后扭成一股长6米的绳子，正好够到水面．这根绳子原来有多少长．
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<result>24</result>