CD is the Roman numeral for 400.
CD = 400
CD
400,000 = (CD)
CD
As a Roman numeral CD is equivalent to -100+500 = 400
Converting between Arabic and Roman Numbers we get,roman numeral CD in standard form is written as 400. CD=400.
400 = CD
((CD)) = 10*1000*400 = 4,000,000
400 C = 100 and D = 500 and when arranged as CD or CD this means 500-100 = 400
MMCDXXIV (MM = 2000, CD = 400, XXIV = 24)
CDXLIV CD = 400, XL = 40, IV = 4