Car A and car B travel from city A to city B at the same speed. Car A travels 12 kilometers first before car B starts; car A returns immediately after arriving at city B. (1/4) from city A to city A meets car B, how many kilometers is the distance between city A and city B?
甲、乙两车以相同的速度从A城到B城，甲车先走12千米，乙车才出发；甲车到乙城后立即返回，在距B城(1/4)处(B城到A城的(1/4))与乙车相遇，A、B两城相距多少千米？
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">6 / (1/4)</gadget>
<output>24</output>

<result>24</result>