The distance between A and B is 2400 meters. A starts from A and B starts from B at the same time, and runs back and forth between A and B. A runs 300 meters per minute. B is 240 meters and stops after 35 minutes. How many times does A and B meet each other closest to A?
A，B两地相距2400米，甲从A地，乙从B地同时出发，在AB两地往返长跑，甲每分钟300米．乙是240米，35分钟后停止．甲乙在第多少次相遇距A最近．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<result>4</result>