Simplify the following text for a Grade 6 native English-speaking person.
Original: Covering an area of 120 m x 75 m ( 9000 square meters , or 0.9 hectares ) it became integrated in the city .
Simplified: It covers an area of 120 m x 75 m ( 9000 square meters , or 0.9 hectares ) and has now become part of the city of Nagasaki .