It is: 0 = N
The roman numerals don't have a way to write 0, negative numbers, or fractions.
Roman numerals are numbers.
You write 1533 in roman numerals like this: MDXXXIII
I-XXX is how you write that with Roman numerals.
the way you write 1000 in roman numerals is M
453 in Roman numerals is CDLIII.
4921in Roman numerals MMMMCMXXI.
662 in Roman numerals is DCXII
MM is 2000 in Roman numerals.
109 in Roman numerals is CIX.
972 = CMLXXII in Roman numerals