A truck and a passenger car depart from places A and B respectively at the same time and meet each other 4 hours later. It is known that the truck travels 75 kilometers per hour, and the speed ratio of the truck to the passenger car is 3:5. How many kilometers are there between A and B?
一辆货车与一辆客车同时分别从甲乙两地相对开出，4小时后相遇．已知货车每小时行75千米，货车与客车的速度比是3：5．求甲乙两地相距多少千米？
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">4 / (3/8)</gadget>
<output>32/3 = around 10.666667</output>

<gadget id="calculator">75 * (32/3)</gadget>
<output>800</output>

<result>800</result>