A truck and a bus are traveling towards each other from places A and B at the same time. It is known that the distance between places A and B is 600 kilometers. The truck travels 60 kilometers per hour, and the bus travels 80 kilometers per hour. After 3 hours, how many kilometers will the distance between the two vehicles be? rice?
货车和客车同时从甲、乙两地相向而行，已知甲乙两地相距600千米，货车每小时行60千米，客车每小时行80千米，3小时后，两车还相距多少千米？
<gadget id="calculator">600 - 520</gadget>
<output>80</output>

<result>80</result>