and B are walking toward each other from A and B respectively. Their speed ratio is 3:2 when they start. After they met for the first time, A’s speed increased by 20%, and B’s speed increased by 30%. In this way, when A arrives at B, B is still 42 kilometers away from A. What is the distance in miles between A and B?
甲、乙两人分别从A、B两地相向而行，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30%，这样当甲到达B地时，乙离A地还有42千米．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">42 / (14/45)</gadget>
<output>135</output>

<result>135</result>