It takes 6 hours for a passenger car to go from place A to place B, and 8 hours for a truck to go from place B to place A. The two cars start from the two places at the same time and drive opposite each other. The truck meets and travels 240km. How many kilometers are there between places A and B?
客车从甲地到乙地需要6小时，货车从乙地到甲地需要8小时，两车同时分别从两地出发相对开出，相遇货车行了240km，甲、乙两地相距多少千米？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">240 / (3/7)</gadget>
<output>560</output>

<result>560</result>