The engineering team builds a section of road. Team A takes 20 days to complete the work alone, and team B takes 30 days to complete the work alone. Now the two teams are working together and can build 60 meters of road every day. How long is the road in meters?
工程队修一段公路，甲队独修要20天完成，乙队独修要30天完成，现在两队合修，每天可修路60米，这段公路长多少米．
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

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

<gadget id="calculator">60 / (1/12)</gadget>
<output>720</output>

<result>720</result>