Simplify the following text for a Grade 7 native English-speaking person.
Original: Previously , Gwadar had been one of three tehsils ( subdistricts ) of Makran District prior to its upgradation as a division .
Simplified: Gwadar is the headquarters of Gwadar District . Previously it was one of 3 tehsils of Makran District before the district was upgraded to a division .