There is a long-distance running race on the circular track. There are 7 people running in front of each athlete, and 7 people are running behind each athlete. How many athletes are there on the track?
环形跑道上正在进行长跑比赛．每位运动员前面有7个人在跑，每位运动员后面也有7个人在跑．跑道上一共有多少个运动员．
<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<result>8</result>