Two cars, A and B, are running opposite each other from AB at the same time. When A travels 84 kilometers, B is still 60% of the distance from A. When A arrives at B, the distance from B to A is the same as that of A. The ratio of the distance traveled by the car is 2:7, how many kilometers is the distance between AB and AB?
甲乙两车分别从AB两地同时相对而行，甲车行驶84千米时，乙车距A地还有全程的60%，当甲车到达B地时，乙车距A地的路程与甲车所行路程的比是2：7，AB两地相距多少千米？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(5/7) / (2/5)</gadget>
<output>25/14 = around 1.785714</output>

<gadget id="calculator">84 * (25/14)</gadget>
<output>150</output>

<result>150</result>