A and B start from two places A and B at the same time and walk towards each other. Their speed ratio is 4:3 when they start. After they meet for the first time, A's speed increases by 10%, and B's speed decreases by 20%. When arriving at B, B is still 78 kilometers away from A, so how many kilometers is the distance between A and B?
甲乙两人分别从AB两地同时出发，相向而行，出发时他们的速度比是4：3，他们第一次相遇后，甲的速度提高10%，乙的速度降低20%，这样当甲到B时，乙离A地还有78千米，那么AB两地的距离是多少千米？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">6 / 11</gadget>
<output>6/11 = around 0.545455</output>

<gadget id="calculator">(3/7) * (6/11)</gadget>
<output>18/77 = around 0.233766</output>

<gadget id="calculator">(4/7) - (18/77)</gadget>
<output>26/77 = around 0.337662</output>

<gadget id="calculator">52 / (26/77)</gadget>
<output>154</output>

<result>154</result>