Two motorcycles A and B start from the attached primary school at the same time. After 7 minutes, car A arrives at the railway station, and car B arrives at the commercial city. The distance from the railway station to the commercial city is 3500 meters. Car A travels 200 meters per minute, how many meters per minute does Car B travel?
甲乙两辆摩托车同时从附小出发，7分钟后，甲车到达火车站，乙车到达商业城，火车站到商业城3500米．甲车每分钟行200米，乙车每分钟行多少米？
<gadget id="calculator">3_500 / 7</gadget>
<output>500</output>

<gadget id="calculator">500 + 200</gadget>
<output>700</output>

<result>700</result>