Oh roman numerals aren't hard
I-1
V-5
X-10
L-50
C-100
D-500
M-1000

Now, Superbowl 40=XL, which I'm sure most of you have noticed at this point... the letters aren't hard it's difficult with numbers like, 1998... which would be... uhm... MCMXCVIII, which broken down is M=1000, CM=900, XC=90, VIII=8 woo hoo fun!

THE JACKEL