It takes 8 hours for a car to drive from station A to station B, and 12 hours for a bus to travel from station B to station A. The two cars depart from the two stations at the same time and meet at a distance of 20 kilometers from the midpoint. How many kilometers are the distance between the two stations?
小轿车从甲站开往乙站需8小时，大客车从乙站开往甲站需12小时，两车从两站同时相向开出，距中点20km处相遇，两站相距多少千米？
<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">40 / (1/5)</gadget>
<output>200</output>

<result>200</result>