Cars A and B depart from stations A and B respectively at the same time. After the first meeting, the two cars continue to drive, and return immediately after arriving at stations A and B. The distance between the second meeting and station B is A and B. 20% of the distance between two stations, it is known that car B has traveled a total of 540 kilometers, how many kilometers are the distance between stations A and B?
甲、乙两车分别同时从A、B两站相对开出，第一次相遇后两车继续行驶，到达A、B两站后立即返回，第二次相遇离B站的距离是A、B两站距离的20%，已知乙车共行了540千米，A、B两站相距多少千米？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) + 1</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">540 / (9/5)</gadget>
<output>300</output>

<result>300</result>