The distance between the entrances of the two buildings is 300 meters. A and B each start from the entrance of one of the buildings and walk in opposite directions at the same time. After 7 minutes, the distance between the two is 860 meters. A walks 37 meters in one minute. How many meters does B walk in one minute?
两座大楼门口相距300米甲乙两人各从其中一座大楼门口出发，同时向相反的方向走去，7分钟后两人相距860米，甲分钟走37米，乙每分钟走多少米？
<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>