A truck and a bus depart from City A and City B at the same time respectively, and drive toward each other. The truck returns immediately after arriving in City B, and the bus also returns immediately after arriving in City A. It is known that the speed ratio of the truck and the bus is 4:3, and the place where the two cars meet for the first time is 24 kilometers away from the place where the two cars meet for the second time, how many kilometers is the distance between A and B?
一辆卡车和一辆客车分别从甲、乙两城同时出发，相向而行，卡车到达乙城后立即返回，客车到达甲城后也立即返回．已知卡车和客车的速度比为4：3，两车第一次相遇地点距第二次相遇地点24千米，求甲、乙两城相距多少千米？
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

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

<gadget id="calculator">(4/7) - (3/7)</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">24 / (1/7) / 2</gadget>
<output>84</output>

<result>84</result>