Two construction teams, A and B, pave asphalt from both ends of a road to the middle at the same time. Team A paves 40 meters a day, and team B paves 50 meters a day. After 4 days, the road is completely paved. How long is the road?
甲乙两个施工队同时从一条公路的两端往中间铺柏油，甲队每天铺40米，乙队每天铺50米，4天后这条公路全部铺完，这条公路长多少米？
<gadget id="calculator">40 + 50</gadget>
<output>90</output>

<gadget id="calculator">90 * 4</gadget>
<output>360</output>

<result>360</result>