Simplify the following text for a Grade 5 native English-speaking person.
Original: TrÃ gastel is a commune in the CÃ tes-d ` Armor department of the region of Brittany in north-western France .
Simplified: TrÃ gastel is a commune . It is found in the region Bretagne in the CÃ tes-d ` Armor department in the west of France .