Team A and Team B build a road together. If team A builds 180 meters of road every day, and team B builds 200 meters of road every day, it will take 4 days to finish the road. How long is the road in meters?
甲乙两队共修一条公路．如果甲队每天修路180米，乙队每天修路200米，那么需要4天才能修完，问这条公路长多少米？
<gadget id="calculator">180 * 4</gadget>
<output>720</output>

<gadget id="calculator">200 * 4</gadget>
<output>800</output>

<gadget id="calculator">720 + 800</gadget>
<output>1_520</output>

<result>1_520</result>