The speed ratio of two trains A and B is 5:4. Train B starts first, and travels from station B to station A. When it is 72 kilometers away from station B, car A departs from station A to station B. The place where the two trains meet is two stations away from A and B. The ratio is 3:4, so how many kilometers is the distance between stations A and B?
甲、乙两列火车的速度比是5：4．乙车先发，从B站开往A站，当走到离B站72千米的地方时，甲车从A站发车往B站，两列火车相遇的地方离A，B两站距离的比是3：4，那么A，B两站之间的距离为多少千米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 * (4/5)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">4 - (12/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">72 / (8/5)</gadget>
<output>45</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">45 * 7</gadget>
<output>315</output>

<result>315</result>