It seems like there might be a little confusion with the term "clxx." In English, "CLXX" is actually a Roman numeral that represents the number 170. However, since you are looking for an explanation in a clear and simple way, I'll break it down for you.
CLXX: This is a Roman numeral that stands for the number 170.
When you see "CLXX," it usually appears in contexts involving history, architecture, or literature where Roman numerals are used.
In advanced contexts, Roman numerals like CLXX are often used to denote the chapters of a book, the pages of a manuscript, or the names of monarchs and popes (e.g., King Henry CLXX).