[torstenvl]

> a dozen of rounds

This made me happy. :)

(In Russian, numeric determiners 2-4 place the noun in genitive singular and numeric determiners 5+ place the noun in genitive plural. One book, two of book, three of book, four of book, five of books.)

[smcl]

Czech is exactly the same - jedno pivo, dvě piva, tří piva, čtyří piva, pět piv, šest piv etc ...