Two cars, A and B, are traveling towards each other from A and B at the same time, with a speed ratio of 7:11. After meeting, the two cars continue to drive, respectively, and return to B and A respectively. When they meet for the second time, car A is 80km away from point B. How many kilometers are there between A and B?
甲乙两辆汽车分别从A，B两地同时相向而行，速度比为7：11，相遇后两车继续行驶，分别到达B，A两地后立即返回．当第二次相遇时，甲车距B地80km．A，B两地相距多少km？
<gadget id="calculator">7 + 11</gadget>
<output>18</output>

<gadget id="calculator">7 / 18</gadget>
<output>7/18 = around 0.388889</output>

<gadget id="calculator">(7/18) * 3</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">(7/6) - 1</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">80 / (1/6)</gadget>
<output>480</output>

<result>480</result>