You cannot because no Roman numeral would include 5 "x"s.
The roman numeral for 5 is: V
IV.
MCMLXII
476 = CDLXXVI in Roman numerals
Roman Numeral for the number 2 is II.
It is: 355 = CCCLV
It is: 1812 = MDCCCXII
To write the number 9 in Roman numerals, you would use the symbol 'IX'. This is made by combining the Roman numeral for 1, 'I', and the Roman numeral for 10, 'X', subtracting 1 from 10.
The roman numeral V represents the number 5.
42 as a Roman numeral is XLII or XXXXII
Roman numeral IX is 9, so six would be VI, IIIIX or IVX.
three Upper case I