Roman number CDI to decimal

The Roman number CDI is equivalent to the number 401 (four hundred one).

401
CDI

CDI = 401
The Roman numbering system (Roman numerals) was created in Ancient Rome, and was used throughout the Roman Empire. It consists of seven capital letters of the Latin alphabet: I, V, X, L, C, D and M.
Keywords: How is the number 401 in Romano, How to write 401 in Roman numerals