The road construction team repaired a road. On the first day, half of the total length was repaired by more than 20 meters. On the second day, the remaining half was repaired by 15 meters. On the third day, 50 meters were repaired, and the remaining 30 meters were not repaired. How long is this road in meters?
修路队修一条路，第一天修了全长的一半多20米，第二天修了余下的一半少15米，第三天修了50米，还剩下30米没有修．这条路全长多少米．
<gadget id="calculator">50 - 15</gadget>
<output>35</output>

<gadget id="calculator">30 + 35</gadget>
<output>65</output>

<gadget id="calculator">65 * 2</gadget>
<output>130</output>

<gadget id="calculator">130 + 20</gadget>
<output>150</output>

<gadget id="calculator">150 * 2</gadget>
<output>300</output>

<result>300</result>