More than 20 children gathered in a circle to play games. They report the number in a clockwise order starting from 1, but the multiples of 7 or numbers with 7 must be skipped and not reported; the person who reported the error performed a show. Xiao Ming was the first person to report the error. When the student on his right reported 90, he reported 91 by mistake. If he reported 19 for the first time, how many people are there in this group of children?
二十多位小朋友围成一圈做游戏．他们依顺时针顺序从小赵报1开始连续报数，但7的倍数或带有7的数都要跳过去不报；报错的人表演一个节目．小明是第一个报错的人，当他右边的同学报90时他错报了91．如果他第一次报数报的是19，那么这群小朋友共有多少人．
<result>24</result>