The highway from Liupanshui to Guiyang is 280 kilometers long. A passenger car and a truck leave from the two places at the same time and drive towards each other. The bus travels 80 kilometers per hour, and the truck travels 60 kilometers per hour. meet?
六盘水到贵阳的公路全长280千米，一辆客车和一辆货车同时从两地开出，相向而行，客车每小时行80千米，货车每小时行60千米，几小时后辆车相遇？
<gadget id="calculator">80 + 60</gadget>
<output>140</output>

<gadget id="calculator">280 / 140</gadget>
<output>2</output>

<result>2</result>