The distance between A and B is 630 kilometers. The passenger car and the truck leave from the two places at the same time and drive toward each other. The two cars meet each other in 3.5 hours. It is known that the passenger car travels 96 kilometers per hour. How many kilometers per hour does the truck travel?
甲乙两地相距630千米，客车和货车从两地同时开出，相向而行，3.5小时两车相遇，已知客车每小时行96千米，货车每小时行多少千米？
<gadget id="calculator">630 / 3.5</gadget>
<output>180</output>

<gadget id="calculator">180 - 96</gadget>
<output>84</output>

<result>84</result>