54 children line up to play the game. There are 12 children participating in each round of the game. When standing at the head of the team, how many rounds of the game have been played.
54个小朋友排队做游戏，每轮游戏有12个小朋友参加，游戏结束后，这12个小朋友按原来的先后顺序排到队尾，如果游戏开始时，小亮站在队首，当小亮再次站在队首时，已经做了多少轮游戏．
<gadget id="calculator">2 * 2 * 3 * 9</gadget>
<output>108</output>

<gadget id="calculator">108 / 12</gadget>
<output>9</output>

<result>9</result>