Cars A and B start from places A and B respectively and drive toward each other. When starting out, the speed ratio of A and B is 5:4. After meeting, A’s speed decreases by 20%, and B’s speed increases by 20%. In this way, when A arrives at B, B is still 10 kilometers away from A. How many kilometers are there between A and B?
甲、乙两车分别从A、B两地出发，相向而行．出发时，甲、乙的速度比是5：4，相遇后，甲的速度减少20%，乙的速度增加20%，这样，当甲到达B地时，乙离A地还有10千米．那么A、B两地相距多少千米？
<gadget id="calculator">1 / 45</gadget>
<output>1/45 = around 0.022222</output>

<gadget id="calculator">10 / (1/45)</gadget>
<output>450</output>

<result>450</result>