The Romans did have a symbol to represent half and it looked like an S and the Latin word for it is semis meaning a half.
Therefore: CS (100 and a 1/2) multiplied by XX (20) = MMX (2010)
XX is 20 in Roman Numerals and LII is 52. 20 x 52 = 1040 In Roman Numerals 1040 is MXL.
XX is the number 20 in Roman numerals. xx
XX is the number 20 in Roman numerals.
20 is Arabic Numerals XX is Roman Numerals.
XX is 20
XX = 20
The Roman numerals of XX are the equivalent of 20 in Hindu-Arabic numerals
XX
20
XX = 20
20
As l11 are not Roman numerals they cannot meaningfully be added to XX (20) to make any result.