Two cars, A and B, start from a certain place at the same time and drive in opposite directions. After 8 hours, the distance between the two cars is 1200 kilometers. It is known that car A travels 70 kilometers per hour, how many kilometers per hour does car B travel?
甲乙两辆汽车同时从某地出发，背向而行，8小时后，两车相距1200千米．已知甲车每小时行70千米，乙车每小时行多少千米？
<gadget id="calculator">1_200 / 8</gadget>
<output>150</output>

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

<result>80</result>