Question 317422
Roman Numerals 
I = 1  C = 100 
V = 5  D = 500 
X = 10  M = 1000 
L = 50    
 

You can use a roman numerals chart or conversion table to lookup roman numerals or you can easily learn how to calculate them yourself with a few simple rules. 

How to Translate Roman NumeralsIf smaller numbers follow larger numbers, the numbers are added. If a smaller number precedes a larger number, the smaller number is subtracted from the larger. For example, if you want to say 1,100 in Roman Numerals, you would say M for 1000 and then put a C after it for 100; in other words 1,100=MC in Roman Numerals.

Some more examples:

VIII = 5+3 = 8 
IX = 10-1 = 9 
XL = 50-10 = 40 
XC = 100-10 = 90 
MCMLXXXIV = 1000+(1000-100)+50+30+(5-1) = 1984 


this was taken from "http://www.yourdictionary.com/crossword/romanums.html"
hope this helps