Simplify the following text for a Grade 6 native English-speaking person.
Original: AmbriÃ res-les-Vall Ã es is a commune in the Mayenne department in north-western France .
Simplified: AmbriÃ res-les-Vall Ã es is a commune of 2,903 people ( 1999 ) . It is found in the region Pays de la Loire in the Mayenne department in the northwest of France .