A train of passenger trains and a train of freight trains depart from places A and B respectively at the same time and travel opposite each other. The passenger train travels 85 kilometers per hour, the truck travels 65 kilometers per hour, and the two trains meet in 18 hours. How long is the railway between A and B?
一列客车和一列货车分别从甲、乙两地同时开出，相对而行．客车每小时行85千米，货车每小时行65千米，18小时两列火车相遇．甲、乙两地之间的铁路长多少千米？
<gadget id="calculator">85 + 65</gadget>
<output>150</output>

<gadget id="calculator">150 * 18</gadget>
<output>2_700</output>

<result>2_700</result>