In the construction of a new socialist countryside, the road construction team built a road around the village. On the first day, 20% of the total length was built, and on the second day it was 720 meters longer than the first day. At this time, the ratio of the repaired to the unrepaired is 5:3, how long is the road around the village in meters?
在社会主义新农村建设中，筑路队修一条环村道路，第一天修了全长的20%，第二天比第一天多修了720米，这时已修的与未修的比是5：3，这条环村道路全长多少米？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(5/8) - (1/5) - (1/5)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">720 / (9/40)</gadget>
<output>3_200</output>

<result>3_200</result>