It takes 8 hours for the express train to travel from point A to point B, and 12 hours for the slow train to travel from point B to point A. The two cars leave at the same time, and the express train is still 150 kilometers away from point B when they meet. What is the distance in kilometers between A and B?
快车从甲地到乙地要行8小时，慢车从乙地到甲地要行12小时，两车同时相对开出，相遇时快车离乙地还有150千米．甲乙两地间的距离是多少千米？
<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">150 / (24/5)</gadget>
<output>125/4 = around 31.25</output>

<gadget id="calculator">(125/4) * 12</gadget>
<output>375</output>

<result>375</result>