A passenger train travels from station A to station B at 80 kilometers per hour; a freight train travels from station B to station A at the same time at 60 kilometers per hour. Two trains meet at a distance of 15 kilometers from the midpoint. How many kilometers are there between the two stations A and B?
一列客车从甲站开往乙站，每小时行80千米；一列货车同时从乙站开往甲站，每小时行60千米．两列车在距离中点15千米处相遇，甲乙两站相距多少千米？
<gadget id="calculator">80 - 60</gadget>
<output>20</output>

<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">80 + 60</gadget>
<output>140</output>

<gadget id="calculator">15 * (1/10) * 140</gadget>
<output>210</output>

<result>210</result>