Roman number DXX to decimal

The Roman number DXX is equivalent to the number 520 (five hundred twenty).

520
DXX

DXX = 520
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 520 in Romano, How to write 520 in Roman numerals