CD in roman numerals is equivalent to 400.
CD = 400
CD = 400
XL=400 * * * * * No. XL is the Roman number 40. 400 is CD.
CD
400 = CD
CD
CD = -100+500 = 400
CD-D
400 (500-100)
If you mean CD plus DC then in Roman numerals they add up to M meaning 400 plus 600 = 1000
1432 in Roman numerals is MCDXXXII.