and B start from the same point A on a circular runway and move in opposite directions. Their speeds are 2 meters per second and 6 meters per second respectively. If they start at the same time and when they meet again for the first time at point A, how many times did they meet from start to finish?
甲乙两人在圆形跑道上从同一点A出发，按相反方向运动，他们的速度分别是每秒2米和每秒6米．如果他们同时出发并当他们在A点第一次再相遇时为止，从出发到结束他们共相遇了几次？
<gadget id="calculator">400 / 100</gadget>
<output>4</output>

<result>4</result>