A train of passenger trains and a train of freight trains run opposite each other from the midpoint of the two cities at the same time. After the truck leaves for 5 hours, the bus arrives at the destination, and it will take 3 hours for the truck to complete the rest of the journey. It is known that the bus is 15 kilometers faster than the truck per hour. How many kilometers is the distance between A and B?
一列客车与一列货车同时从甲乙两城的中点相背而行．货车开出5小时后，客车到达终点，货车走完剩下的路程还要3小时，已知客车每小时比货车快15千米．甲乙两城间的路程有多少千米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/5) - (1/8)</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">15 / (3/40)</gadget>
<output>200</output>

<gadget id="calculator">200 * 2</gadget>
<output>400</output>

<result>400</result>