After a few days of repairing a road, the ratio of the repaired to the unrepaired is 3:8, and another 1500 meters is repaired, which is just half of the road. How many meters is this road?
修一条路，修了几天后，修了的与未修的比为3：8，再修1500米刚好修了这条路的一半，求这条路有多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 11</gadget>
<output>3/11 = around 0.272727</output>

<gadget id="calculator">(1/2) - (3/11)</gadget>
<output>5/22 = around 0.227273</output>

<gadget id="calculator">1_500 / (5/22)</gadget>
<output>6_600</output>

<result>6_600</result>