The program automatically detects whether the number is in Arabic or Roman numerals and makes the conversion/translation.
Roman numeration does not permit to write large numbers, beyond 9999 the program will display the number of thousands separately.
The Roman numbering system also lives on in our languages, which still use Latin word roots to express numerical ideas. Like the X's and L's, the C's are tacked on to the beginning of numbers to indicate how many hundreds there are: CCCLXIX is 369. You see a lot of Ms because Roman numerals are used a lot to indicate dates. Nova Roma counts years from the founding of Rome, ab urbe condita.However, Roman numerals are not a purely additive number system. Roman numerals are encountered in the release year for movies and occasionally on the numerals on the faces of watches and clocks, but in few other modern instances. In particular, instead of using four symbols to represent a 4, 40, 9, 90, etc. They do have the advantage that addition can be done "symbolically" (and without worrying about the "place" of a given digit) by simply combining all the symbols together, grouping, writing groups of five Is as V, groups of two Vs as X, etc. Roman numerals originated, as the name might suggest, in ancient Rome.There are seven basic symbols: I, V, X, L, C, D and M.