The two ends of the playground are 300 meters apart. Two students, A and B, walk in opposite directions from one end of the playground. After 7 minutes, the distance between the two is 860 meters, student A walks 37 meters per minute, how many meters does student B walk per minute?
运动场，两端相距300米，甲乙两个同学各从运动场一端向相反方向走去．7分钟后，两人相距860米，甲同学每分钟走37米，乙同学每分钟走多少米？
<gadget id="calculator">860 - 300</gadget>
<output>560</output>

<gadget id="calculator">560 / 7</gadget>
<output>80</output>

<gadget id="calculator">80 - 37</gadget>
<output>43</output>

<result>43</result>