If 8 people play a table tennis singles match, if it is a knockout match (two people compete, the loser will withdraw from the game, and the winner will be compared with other players), how many games will it take to determine the champion?
8个人进行乒球单打比赛，如果是淘汰赛(两个人进行比赛，输的退出不再比赛，赢的再与其他人比)，决出冠军一共要进行多少场比赛？
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<result>7</result>