How many pieces can a rope be cut into if it is folded in half 3 times and then cut in the middle?
一根绳子对折3次，再从中间剪开，可剪成多少段．
<gadget id="calculator">2 ** 3</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<result>9</result>