Two athletes practice long-distance running on the circular track by the lake. A runs 250 meters per minute, and B runs 200 meters per minute. Both start at the same time and in the same direction. After 45 minutes, A catches up with B. If two people set off in the opposite direction at the same time, how many minutes will it take for the two to meet?
两名运动员在湖边环形跑道上练习长跑，甲每分钟跑250米，乙每分钟跑200米，两个同时同地同向出发，经过45分钟甲追上乙．如果两人同时同地反向出发，经过多少分钟两人相遇．
<gadget id="calculator">250 * 45</gadget>
<output>11_250</output>

<gadget id="calculator">200 * 45</gadget>
<output>9_000</output>

<gadget id="calculator">11_250 - 9_000</gadget>
<output>2_250</output>

<gadget id="calculator">250 + 200</gadget>
<output>450</output>

<gadget id="calculator">2_250 / 450</gadget>
<output>5</output>

<result>5</result>