A and B are walking toward each other from two places AB at the same time. When they met, B walked the whole distance (1/4). When A arrived at B, B was still 8 kilometers away from A. How many kilometers is it.
甲乙二人分别从AB两地同时相向而行，，相遇时，乙走了全程的(1/4)，当甲到达B地时，乙离A点还有8千米，则AB两地距离是多少千米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/4) * (1/3)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 - (1/12) - (1/4)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">8 / (2/3)</gadget>
<output>12</output>

<result>12</result>