Car A and car B depart from stations A and B at the same time, and meet after 12 hours. Car A arrives at station B 8 hours after meeting. How many hours does car B have to travel to reach station A after meeting?
A车和B车，同时从甲乙两站相对开出，经12小时后相遇，A车在相遇后8小时到达乙站，求B车在相遇后，还要行几小时才到达甲站﹖
<gadget id="calculator">8 / 12</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 / (2/3)</gadget>
<output>18</output>

<result>18</result>