Two engineering teams, A and B, are working together to build a road. Team A builds 150 meters per day, and Team B builds 170 meters per day. The two teams started repairing from both ends of the road at the same time, and finished all repairs in 15 days. How long is this road in meters?
甲、乙两个工程队合修一条公路，甲每天修150米，乙队每天修170米．两队同时从公路的两端修起，15天后全部修完．这条公路全长多少米？
<gadget id="calculator">150 + 170</gadget>
<output>320</output>

<gadget id="calculator">320 * 15</gadget>
<output>4_800</output>

<result>4_800</result>