Roman and Arabic Numerals

I	1	IX	9	XVII	17	LX	60	CCCC	400
II	2	X	10	XVIII	18	LXX	70	CD	400
III	3	XI	11	XIX	19	LXXX	80	D	500
IV	4	XII	12	XX	20	XXC	80	DC	600
V	5	XIII	13	XXI	21	XC	90	DCC	700
VI	6	XIV	14	XXX	30	C	100	CM	900
VII	7	XV	15	XL	40	CC	200	M	1000
VIII	8	XVI	16	L	50	CCC	300	MM	2000