It is MM.
It is: 205 = CCV in Roman numerals
We do use Roman numerals today. For example, Roman numerals are often found in making outlines; to label book chapters; to label the frontmatter (pages) in books.
The Roman numerals for 64 are ILXV (65-1) or LXIIII (64) and they are not LXIV. So your question is: What is the cube root of LXIIII in Arabic numerals? The answer is 4 which is IIII or IV in Roman numerals.
As written 'mcmlxxx' it is meaningless. Roman Numerals are ALWAYS CAPITAL letters ; MCMLXXX MCMLXXX = 1980.
The Roman numeral MCMLI represents the number (or year) 1951
The Roman numeral MCMLI represents the number 1951
1951
mcmlI is 1951
In todays modern notation of Roman numerals it appears as MCMLI
Today's conventional conversion of 5-30-1951 into Roman numerals is V-XXX-MCMLI.
1951 m=1,000 cm=900 l=50 i=1
The Roman numeral MCLMI is not a normal use of that number system. More likely, you meant MCMLI which is 1951.
The standard number for the Roman numeral MCMLI is 1951.
Under today's rules now governing the Roman numeral system MCMLI is equivalent to 1951
In Roman numerals it is the year MCMLXIV. In Arabic numerals it is the year 1964.
The year 1450 is written in roman numerals as MCDL.