Roman Square Evolution n = 0 I = 1 V = 5 X = 10 L = 50 N = 90 C = 100 D = 500 M = 1000 Modifiers: | | = ×10 ‾ = ×1000 Examples of | | : |I| = 10 |X| = 100 |C| = 1000 |M| = 10000 ect. Examples of ‾ : I̅ = 1000 V̅ = 5000 X̅ = 10000 M̅ = 1000000 I̅̅ = 1000000 ect.
"CCCC" is not roman 400, "CD" is roman 400
