124 students play card competition, 4 people in a group, the students who win each time will stay and continue to participate, and the other three will be eliminated. In this way, how many games are needed to determine the champion.
124名同学打牌比赛，4人一组，每次获胜的同学留下继续参赛，其他三人淘汰．这样共需打多少场才能决出冠军．
<gadget id="calculator">124 / 4</gadget>
<output>31</output>

<gadget id="calculator">31 + 7 + 2 + 1</gadget>
<output>41</output>

<result>41</result>