XVI-III-MMX
300 would be represented by 'CCC' in roman numerals.
If u would like a list, go to... http://www.romannumerals.co.uk/roman-numerals/numerals-list.html
The date 25-01-2009 in Roman numerals would be XXV.I.MMIX
MDCCCLII
The roman numerals for 987 looks like this CMLXXXVII
It's CXLVII. Possibly you would like to know what CXLVII is in Arabic Numerals.
20 in Roman numerals is XX.
March 3rd, 1989 written in Roman numerals would look like: III/III/MCMLXXXIX
In todays modern notation of Roman numerals 1954 is MCMLIV but the ancient Romans would have expressed them quite differently
18 in roman numerals looks like XVIII
It would look like XV.XII.MMVIII
The Roman numerals are XLV.