A passenger car departs from A to B, and a truck drives from B to A at the same time. After 10 hours, the bus just completes the journey (8/9), and the truck just exceeds the midpoint by 30 kilometers. It is known that the bus 18 kilometers per hour than the truck, how many kilometers is the distance between A and B?
一辆客车从甲地出发往乙地，同时一辆货车从乙地开往甲地，10小时后客车刚好行完全程的(8/9)，货车刚超过中点30千米，已知客车每小时比货车多行18千米，甲、乙两地的路程是多少千米？
<gadget id="calculator">420 / 9</gadget>
<output>140/3 = around 46.666667</output>

<gadget id="calculator">9 * (140/3)</gadget>
<output>420</output>

<result>420</result>