Cars A and B start from A and B respectively and drive towards each other. When starting, the speed ratio of A and B is 5:4. After meeting, the speed of A decreases by 20%. In this way, when A arrives at B , B is still 10 kilometers away from A, how many kilometers is the distance between the two places?
甲、乙两车分别从A、B两地出发，相向而行，出发时，甲、乙的速度比为5：4，相遇后，甲的速度减少20%，这样，当甲到达B地时，乙离A地还有10千米，两地相距多少千米？
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / 9</gadget>
<output>4/45 = around 0.088889</output>

<gadget id="calculator">5 * (4/45)</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(5/9) - (4/9)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">10 / (1/9)</gadget>
<output>90</output>

<result>90</result>