Add together the individual numerals (M = 1000, D = 500, C = 100, L = 50, X = 10, V = 5, I = 1) unless a smaller numeral precedes a larger one in which case subtract it from the larger ones.
→ 2014 = 1000 + 1000 + 10 + (-1 + 5) = MMXIV
I,II,III,IV,V,VI
It is: 132 = CXXXII in Roman numerals
294
50
MDCCXC
Regardless of what symbols you choose to write it, it still means five hundred.
1900
1236
72
750 = DCCL
XX
1000