And there was light.
It looks like you're referring to a Portuguese edition of Isaac Asimov's short stories: Nove Amanhãs ( Nine Tomorrows ), Volumes 1 and 2. Isaac Asimov - Nove Amanhas-Vol. 1 e 2.pdf
The Cosmic AC analyzes all the data it has gathered across eternity. Finally, it understands how to reverse entropy. But there are no humans left to show the result. And there was light
Since you asked for a "detailed story," I’ll assume you want a detailed summary of one of the most famous stories from that collection — and arguably one of Asimov’s best short stories — (which appears in Nine Tomorrows ). Isaac Asimov - Nove Amanhas-Vol. 1 e 2.pdf