Two people, A and B, start from A and B at the same time and walk toward each other. When they start, their speed ratio is 3:2. After they meet, A's speed increases by 20%, and B's speed increases by 30%. When arriving at B, B is still 140 kilometers away from A, so how many kilometers is the distance between A and B?
甲、乙二人从A、B两地同时出发，相向而行，出发时他们的速度比是3：2，他们相遇后，甲的速度提高20%，乙的速度提高30%，这样当甲到达B地时，乙离A地还有140千米，那么A、B两地的距离是多少千米？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">13 / 18</gadget>
<output>13/18 = around 0.722222</output>

<gadget id="calculator">(2/5) * (13/18)</gadget>
<output>13/45 = around 0.288889</output>

<gadget id="calculator">(3/5) - (13/45)</gadget>
<output>14/45 = around 0.311111</output>

<gadget id="calculator">140 / (14/45)</gadget>
<output>450</output>

<result>450</result>