A train of passenger trains and a train of freight trains depart from two cities at the same time. When the two trains meet, the distance from the midpoint is 25 kilometers. It is known that the average speed of the passenger train is 55 kilometers per hour, and the average speed of the freight train is that of the passenger train (6/11) ． How many kilometers is the railway between the two cities?
一列客车和一列货车同时从两个城市相对开出，两车相遇时距中点25千米，已知客车的平均速度每小时是55千米，货车的平均速度是客车的(6/11)．求两个城市之间的铁路长多少千米？
<gadget id="calculator">6 / 11</gadget>
<output>6/11 = around 0.545455</output>

<gadget id="calculator">55 * (6/11)</gadget>
<output>30</output>

<gadget id="calculator">55 + 30</gadget>
<output>85</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<gadget id="calculator">55 - 30</gadget>
<output>25</output>

<gadget id="calculator">50 / 25</gadget>
<output>2</output>

<gadget id="calculator">85 * 2</gadget>
<output>170</output>

<result>170</result>