"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.

[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!

[Ajax737858]

'I drank my first beer at four precisely (or: exactly)' is perfectly OK to my BrE ear. 'precisely/exactly at four' is possibly less usual but also fine.

[Karel46139]

Je možné použít "Right at four o'clock...."?

[Ajax737858]

My 'I drank my first beer at four o'clock exactly' should not have been rejected. If anything, it is the most likely version in BrE....