The passenger car and the freight car leave oppositely from two places 840 kilometers apart at the same time, and after 5 hours, the two cars meet. It is known that the passenger car travels 82.5 kilometers per hour, how many kilometers per hour does the truck travel?
客车和货车同时从相距840千米的两地相对开出，经过5小时两车相遇．已知客车每小时行驶82.5千米，货车每小时行驶多少千米？
<gadget id="calculator">840 / 5</gadget>
<output>168</output>

<gadget id="calculator">168 - 82.5</gadget>
<output>85.5</output>

<result>85.5</result>