Two people, A and B, walk around the circular runway at the same time with their backs facing each other. A runs 5 meters per second, and B runs 6 meters per second. It is known that A and B ran 72 meters after meeting before returning to the original starting point. How many seconds does it take for A to go around the runway?
甲、乙两人绕环形跑道同时同地背向而行，甲每秒跑5米，乙每秒跑6米，已知甲与乙相遇后又跑了72米才回到原来出发地，求甲绕跑道一周需要多少秒？
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">72 / 6</gadget>
<output>12</output>

<gadget id="calculator">12 / 5</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">11 * (12/5)</gadget>
<output>132/5 = around 26.4</output>

<result>132/5 = around 26.4</result>