rope is folded in half at the middle each time, and the length of the rope is 0.3 meters after being folded 3 times. How long is this rope?
一根绳子每次在中间处对折，对折了3次后绳子长0.3米．这根绳子原来长多少米？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">0.3 / (1/8)</gadget>
<output>2.4</output>

<result>2.4</result>