Stay away from the other two palaces and integrate yourself. Buy a joint ticket for 160 kronor / people, and the individual tickets are 90, 60, 60, 60 kronor respectively. After buying the ticket, go to the small room in the opposite canteen to save the package, free of charge. Back to the ticket office is actually a visit to the entrance, put on a shoe cover, go upstairs to visit the Royal Reception Hall (the second floor has a bathroom to use). The Royal Kitchen, Ruins and stables have different entrances, and you have to show your tickets. The Royal Kitchen has short videos of the royal banquet process, and the ruins have short videos of the Copenhagen fire. The stables are very simple inside, all white horses, and they happen to see them train horses on the outside field.