After half of a rope is used up, the remaining half is used up to 2 meters, and there are 17 meters left. How long is the rope in meters?
一根绳子用去一半后，又用去剩下的一半多2米，还剩17米，这根绳子长多少米．
<gadget id="calculator">17 + 2</gadget>
<output>19</output>

<gadget id="calculator">19 * 4</gadget>
<output>76</output>

<result>76</result>