A village built a section of road. Half of the total length was repaired for the first time, 200 meters for the second time, and the remaining half for the third time. There was still 150 meters left to be repaired. How long is this road in meters?
某村修一段路，第一次修了全长的一半，第二次修了200米，第三次修了剩下的一半，还剩150米没有修好．这条路全长多少米？
<gadget id="calculator">200 + 150 + 150</gadget>
<output>500</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">500 / (1/2)</gadget>
<output>1_000</output>

<result>1_000</result>