"Přesně ve čtyři hodiny jsem vypil svoje první pivo."

Translation: Exactly at four o'clock, I drank my first beer.

[Nackles]

Should be "At exactly" not "Exactly at" and without comma. Reported.

[BoneheadBass]

Options with "at exactly" are among the accepted translations.

[Taras895680]

I drank my first beer at four precisely. Or it has to be "precisely at four"?

[Taras895680]

By the way, what does this sentence have to do with science?)

[VladaFu]

From the life of a scientist, working 8 to 4.

[Taras895680]

As to my experience in Czechia everything has something to do with beer. And I am to admit that I love it!