A rope, folded in half for the first time and then cut from the middle, it will become two from the original one, and then folded in half at the same time for the second time and then cut from the middle, the original 2 becomes 4, and so on. After cutting three times, how many times the number of ropes is the original?
一根绳子，第一次对折后从中间剪开，就从原来的一根变成两根，第二次再把这2根同时对折后从中间剪开，就由原来的2根变成了4根，以此类推．剪三次后，绳子的数量是原来的几倍？
<gadget id="calculator">2 ** 1</gadget>
<output>2</output>

<gadget id="calculator">2 ** 3</gadget>
<output>8</output>

<result>8</result>