Two people, A and B, are running in the same direction from a certain place on a circular runway with a circumference of 400 meters. A runs 250 meters per minute, and B runs 300 meters per minute. After how many minutes, the two meet?
甲、乙两人在周长为400米的环形跑道上同时从某地同向而行，甲每分钟跑250米，乙每分跑300米，多少分后两人相遇？
<gadget id="calculator">300 - 250</gadget>
<output>50</output>

<gadget id="calculator">400 / 50</gadget>
<output>8</output>

<result>8</result>