Car A and car B are traveling towards each other from two places at the same time. After 2.5 hours, car B meets at a place 8.5 kilometers beyond the midpoint. Car B travels 90 kilometers per hour, how many kilometers per hour does Car A travel?
甲乙两车同时从两地相向而行，经过2.5时后，乙车在超过中点8.5千米的地方相遇．乙车每时行90千米，甲车每时行多少千米？
<gadget id="calculator">2 / 2.5</gadget>
<output>0.8</output>

<gadget id="calculator">8.5 * 0.8</gadget>
<output>6.8</output>

<gadget id="calculator">90 - 6.8</gadget>
<output>83.2</output>

<result>83.2</result>