The distance between AB and AB is 540 kilometers. Cars A and B drive separately from A and B at the same time. After 1.5 hours, the distance between the two cars is still 360 kilometers. How many hours will it take for the two cars to meet again?
AB两地相距540千米，甲乙两车同时分别从A、B两地对开，1.5小时后，两车还相距360千米．两车再行多少小时才能相遇？
<gadget id="calculator">540 - 360</gadget>
<output>180</output>

<gadget id="calculator">180 / 1.5</gadget>
<output>120</output>

<gadget id="calculator">360 / 120</gadget>
<output>3</output>

<result>3</result>