rope, half of its total length is cut off for the first time and 3 meters is cut off, and half of its total length is cut off for the second time, leaving 20 meters left. How many meters is this rope originally?
一根绳子，第一次剪去全长的一半多3米，第二次剪去全长的一半少5米，还剩20米，这根绳子原来长多少米？
<gadget id="calculator">30 + 3</gadget>
<output>33</output>

<gadget id="calculator">33 * 2</gadget>
<output>66</output>

<result>66</result>