It takes 8 hours for a passenger car to drive from city A to city B, and it takes 12 hours for a truck to drive from city B to city A. The two cars leave from the two cities at the same time, and the bus travels 264 kilometers when they meet. How many kilometers are the two cities apart?
一辆客车从甲城开往乙城要8小时，一辆货车从乙城开往甲城要12小时，两车同时从两城开出，相遇时客车行了264千米．两城相距多少千米？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">264 / (3/5)</gadget>
<output>440</output>

<result>440</result>