The distance between A and B stations is less than 400 kilometers. Two trains A and B depart from A and B opposite to each other. Line A stops at 210 kilometers and B stops at 270 kilometers. At this time, the distance between the two cars is exactly (1/3) of the distance between the two stations of A and B. How many kilometers is the distance between the two stations of A and B?
甲乙两站相距不到400千米，A、B两列火车从甲乙两站相对开出，A行至210千米处停车，B行至270千米处也停车．这时两车相距正好是甲乙两站距离的(1/3)，问甲乙两站之间的距离是多少千米？
<gadget id="calculator">210 + 270</gadget>
<output>480</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">480 / (4/3)</gadget>
<output>360</output>

<result>360</result>