The distance between two railway stations is 425 kilometers. Two trains, A and B, leave opposite to each other at the same time and meet after 2.5 hours. Car A travels 90 kilometers per hour, how many kilometers per hour does Car B travel?
两个火车站相距425千米，甲、乙两列火车同时从两个火车站相对开出，经过2.5小时相遇．甲车每小时行90千米，乙车每小时行多少千米？
<gadget id="calculator">425 / 2.5</gadget>
<output>170</output>

<gadget id="calculator">170 - 90</gadget>
<output>80</output>

<result>80</result>