A passenger car and a freight car depart from two places 360 kilometers apart at the same time. After 2 hours, the two cars meet on the way. The passenger car travels 100 kilometers per hour, how many kilometers per hour does the truck travel?
客车和货车同时从相距360千米的两地相对开出，经过2小时两车在途中相遇．客车每小时行100千米，货车每小时行多少千米？
<gadget id="calculator">360 / 2</gadget>
<output>180</output>

<gadget id="calculator">180 - 100</gadget>
<output>80</output>

<result>80</result>