Two cars A and B are traveling toward each other from two places 360 kilometers apart at the same time, and meet each other in 4 hours. If car A travels 40 kilometers per hour, how many kilometers per hour does car B travel?
甲乙两辆汽车同时从相距360千米的两地相向而行，4小时相遇，如果甲车每小时行40千米，那么乙车每小时行多少千米？
<gadget id="calculator">360 / 4</gadget>
<output>90</output>

<gadget id="calculator">90 - 40</gadget>
<output>50</output>

<result>50</result>