A and B start from A and B respectively at the same time and walk toward each other. When they start, their speed ratio is 3:2. After they meet for the first time, A's speed increases by 20%, and B's speed increases. 60%. In this way, when A arrives at B, B is still 7 kilometers away from A, so how many kilometers is the distance between A and B?
甲、乙两人分别从A、B两地同时出发，相向而行，出发时他们的速度比是3：2，他们第一次相遇后，甲的速度提高了20%，乙的速度提高了60%，这样，当甲到达B地时，乙离A地还有7千米，那么A、B两地的距离是多少千米？
<gadget id="calculator">315 / 11</gadget>
<output>315/11 = around 28.636364</output>

<result>315/11 = around 28.636364</result>