It takes 8 hours for a bus to travel from Station A to Station B, and 12 hours for a truck to travel from Station B to Station A. The two cars depart from two stations at the same time, and when they meet, the bus is still 156 kilometers away from station B. How many kilometers are the distance between the two stations?
客车由甲站开往乙站需要8小时，货车从乙站开往甲站需要12小时．两车同时从两站相向开出，相遇时客车离乙站还有156千米．问两站相距多少千米？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/8) + (1/12)</gadget>
<output>5/24 = around 0.208333</output>

<gadget id="calculator">1 / (5/24)</gadget>
<output>24/5 = around 4.8</output>

<gadget id="calculator">(1/8) * (24/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">156 / (2/5)</gadget>
<output>390</output>

<result>390</result>