If the young pioneers plant trees, if each person digs 6 holes, there are still 3 holes that no one will dig; if 2 of them dig 5 holes each, and the rest dig 7 holes, then the holes will be dug exactly. Q: How many holes will be dug in total?
少先队员植树，如果每人挖6个坑，那么还有3个坑无人挖；如果其中2人各挖5个坑，其余每人挖7个坑，那么恰好将坑挖完．问：一共要挖几个坑？
<result>45</result>