This is the 11100th most frequent Polish word.
gazetą
"Gazetą" means "newspaper" (instrumental case) in English.
In this sentence, 'gazecie' is the locative case form of 'gazeta', meaning 'newspaper', used to indicate location.
Czytałem wczoraj artykuł w starej gazecie.
I read an article in an old newspaper yesterday.
In this sentence, 'gazetę' is the accusative case form of 'gazeta', used as the direct object of the verb 'kupiliśmy' (we bought).
Kupiliśmy gazetę na stacji kolejowej.
We bought a newspaper at the train station.
Here, 'gazetą' is the instrumental case form of 'gazeta', indicating accompaniment or means (under with the newspaper).