It takes 30 days for team A to build a road alone, and 20 days for team B to build it alone. Now, team A and team B are working together for 5 days to build 1250 meters. How long is the road in meters?
修一条路，甲队单独修要30天完工，乙队单独修要20天完工，现在甲、乙两队合修5天，修了1250米，这条路全长多少米？
<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/30) + (1/20)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 5</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1_250 / (5/12)</gadget>
<output>3_000</output>

<result>3_000</result>