i need help with roman numerals asap

Question

I is 1
V is 5
X is ten
L is 50
C is 100
D is 500
M is 1000

with this you can make any number
you can only put 3 of anything in a row though
so you can only do III not IIII
for 4 you IV if a smaller symbol is in front then you subtract its worth from the larger. so IL is 49

but if a smaller is after a larger you add
so DXXXIV is 534 and so on 2007 is MMVII (M(1000)+ M(1000)+V(5)+I(1)+I(1)

What kind of help and in what area of math. Roman numerals are pretty simple.

I has a value of one and is simply repeated to reach every integer until 4 at which point you use IV. V has a value of five. X has a value of 10, L--50, C--100, D--500, M--1000.

how do u do 110

CX

how about
120
130
140
150
160
170
180
190