The distance between A and B is 300 kilometers. Two passenger and freight cars depart from A and B at the same time. The passenger car travels 80 kilometers per hour on average, and the truck travels 60 kilometers per hour on average. After 2.5 hours, how many kilometers is the distance between the two cars? rice?
甲、乙两地相距300千米，客货两车从甲、乙两地同时出发，客车平均每小时行80千米，货车平均每小时行60千米，2.5小时后，两车相距多少千米？
<gadget id="calculator">80 + 60</gadget>
<output>140</output>

<gadget id="calculator">140 * 2.5</gadget>
<output>350</output>

<gadget id="calculator">350 - 300</gadget>
<output>50</output>

<result>50</result>