It is: D = 500
D = 500
500 500
That represents 500.
The D stands for 500. It goes I, V, X, L, C, D and then M.
Presumably you mean in Roman numerals in which case they stand for 1000, 500 and 100 respectively.
X V D C in roman numerals
5*100 = 500 c+c+c+c+c = D
It represents: 500*1,000 = 500,000
The letter "D" represents the number 500 in Roman numerals, while the letter "X" represents the number 10.
L=50 c=100 d=500 m=1000
G is not a numeral in roman language. The numerals are only I, V, X, L, C, D and M.
It might stand for several things, of course. For one, "C" is 100, and "D" is 500, in Roman Numerals, so it might mean "5 hundreds in a 500".