Two trains A and B depart from places a and b at the same time. At 10 o'clock, train A and train B meet at a distance of 120 kilometers from the midpoint. It is known that the speed ratio of train A and train B is 6:5. How many kilometers apart.
甲、乙两列火车同时从a，b两地相对开出，10时，甲车与乙车距离中点120千米处相遇，已知甲车与乙车的速度比6：5，两地相距多少千米．
<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">6 + 5</gadget>
<output>11</output>

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

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">(6/11) - (5/11)</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">240 / (1/11)</gadget>
<output>2_640</output>

<result>2_640</result>