Cars A and B respectively depart from AB at the same time and meet each other after 5 hours. After arriving at their destinations, they each rest for 1 hour and then return at their original speed. How long has it been since we first set off when we met again?
甲、乙两车分别从AB两地同时相对开出，经过5小时相遇，分别到达目的地后，各休息1小时，再以原速返回．当再次相遇时离最初出发时经过了多长时间？
<gadget id="calculator">5 + 5 + 1 + 5</gadget>
<output>16</output>

<result>16</result>