The speed of car A is that of car B (6/7). The two cars travel towards each other from stations A and B at the same time and meet at 2.5 kilometers from the midpoint. How many kilometers are the distance between stations A and B?
甲车的速度是乙车的(6/7)，两车从A、B两站同时相向而行，在离中点2.5千米相遇，A、B两站相距多少千米？
<gadget id="calculator">6 + 7</gadget>
<output>13</output>

<gadget id="calculator">6 / 13</gadget>
<output>6/13 = around 0.461538</output>

<gadget id="calculator">5 / 13</gadget>
<output>5/13 = around 0.384615</output>

<gadget id="calculator">(6/13) - (5/13)</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">2 / (1/13)</gadget>
<output>26</output>

<gadget id="calculator">2.5 * 26</gadget>
<output>65</output>

<result>65</result>