What does xcll mean in Roman numerals?

Answer 1

Add together the individual numerals (M = 1000, D = 500, C = 100, L = 50, X = 10, V = 5, I = 1) unless a smaller numeral precedes a larger one in which case subtract it from the larger ones.

→ XCII = (-10 + 100) + 1 + 1 = 92

Answer 2

C represents 100 and X represents 10. Since the X comes before the C you subtract it to give 92.