The circumference of a circular runway is 400 meters. Two athletes, A and B, start from the starting point clockwise at the same time. A's speed is 400 m/min, and B's speed is 375 m/min. A few minutes later, A and B meet again.
环形跑道周长400米，甲乙两名运动员同时顺时针自起点出发，甲速度是400米/分，乙速度是375米/分．多少分后甲乙再次相遇．
<gadget id="calculator">400 - 375</gadget>
<output>25</output>

<gadget id="calculator">400 / 25</gadget>
<output>16</output>

<result>16</result>