Two cars, A and B, drive from two places 840 kilometers apart at the same time, and they meet after 5.6 hours. It is known that car B travels 70 kilometers per hour, how many kilometers per hour does car A travel?
甲乙两辆汽车同时从相距840千米的两地相对开出，经过5.6小时两车相遇．已知乙车每小时行70千米，甲车每小时行多少千米？
<gadget id="calculator">840 / 5.6</gadget>
<output>150</output>

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

<result>80</result>