Two people, A and B, are running on a 500-meter-long circular track. When A runs from the starting point at a speed of 300 meters per minute for 1 minute, B runs in the same direction from the starting point. From then on, it takes A 5 minutes to catch up with B. Question: How many meters does B run per minute?
甲、乙两人在500米长的环形跑道上跑步．甲以每分钟300米的速度从起点跑出1分钟时，乙从起点同向跑出，从这时起甲用了5分钟赶上乙．问：乙每分钟跑多少米？
<gadget id="calculator">300 * 1</gadget>
<output>300</output>

<gadget id="calculator">500 - 300</gadget>
<output>200</output>

<gadget id="calculator">200 / 5</gadget>
<output>40</output>

<gadget id="calculator">300 - 40</gadget>
<output>260</output>

<result>260</result>