The Roman numeral for 11 is XI.
Z is not a Roman numeral. The Roman numerals are I, V, X, L, C, D, M.
The Roman numeral MMCLXIV represents the number 2164
That would be MMXIII. M is one thousand, so you write two of them. X is ten, and I is one so you write three of them.
d or D is a Roman numeral equivalent to 500
394 = CCCXCIV in Roman numerals
In today's modern usage of Roman numerals, CCCXCIV represents 394, but the ancient Romans would have converted and notated the equivalent of 394 into Roman numerals entirely quite differently.
2001 as a roman numeral is MMI
It is: 500 = D as a Roman numeral
As a Roman numeral 326 is CCCXXVI
CCLXMMMCDXXIV is the Roman Numeral of 263424.
The Roman numeral for 4 is written as IV.
The Roman numeral for 295 is CCXCV.
It is: 38 = XXXVIII as a Roman numeral
1 = I as a Roman numeral
Roman Numeral MMDLXII
1566 coverted into a Roman numeral is MDLXVI