Simplify the following text for a Grade 6 native English-speaking person.
Original: Grez-en-Bou Ã re is a commune in the Mayenne department in north-western France .
Simplified: Grez-en-Bou Ã re is a commune of 981 people ( 2004 ) . It is found in the Pays de la Loire region in the Mayenne department in the northwest of France .