How to convert MMMCDXII roman numeral to arabic numeral?

Convert number MMMCDXII from roman numeral to arabic numeral

Conversion table

Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers in this system are represented by combinations of letters from the Latin alphabet.

Symbol I V X L C D M
Value 1 5 10 50 100 500 1000

Ex:
2014 = MM + X + IV = MMXIV

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