SELECT count(*) FROM Reservations AS T1 JOIN Rooms AS T2 ON T1.Room  =  T2.RoomId WHERE T2.maxOccupancy  =  T1.Adults + T1.Kids;
How many times the number of adults and kids staying in a room reached the maximum capacity of the room?
[Schema (values) (types)]: | inn_1 |  Rooms : roomid (text) , roomname (text) , beds (text) , bedtype (number) , maxoccupancy (text) , baseprice (number) , decor (number) | Reservations : code (text) , room (text) , checkin (text) , checkout (number) , rate (text) , lastname (number) , firstname (number) , adults (text) , kids (number);