Two cars, A and B, drive from two places 810 kilometers apart at the same time, and they meet after 5.4 hours. It is known that car B travels 80 kilometers per hour, how many kilometers per hour does car A travel?
甲乙两辆汽车同时从相距810千米的两地相对开出，经过5.4小时两车相遇．已知乙车每小时行80千米，甲车每小时行多少千米？
<gadget id="calculator">810 / 5.4</gadget>
<output>150</output>

<gadget id="calculator">150 - 80</gadget>
<output>70</output>

<result>70</result>