Two cities, A and B, are 280 kilometers apart. Two cars drive from the two cities at the same time. The two cars meet each other in 3.5 hours. It is known that one of the cars travels 38 kilometers per hour, and how many kilometers per hour does the other car travel?
甲乙两城相距280千米，两辆汽车同时从两城相对开出，3.5小时两车相遇，已知其中一辆汽车每小时行38千米，另一辆汽车每小时行多少千米？
<gadget id="calculator">280 / 3.5</gadget>
<output>80</output>

<gadget id="calculator">80 - 38</gadget>
<output>42</output>

<result>42</result>