The Roman numeral for 50,000 is represented as "L" with a line over it, which signifies multiplication by 1,000. Therefore, 50,000 is written as ( \overline{L} ). In traditional Roman numerals, there isn't a specific numeral for 50,000, so this notation is used for larger values.
XIII.
CDLXXVIII
LXXXI
XXI
MDCCCC.
47
70 = LXX
It is: 1066 = MLXVI
146
400 = CD
DCCCLXXXVIII
It is: 261 = CCLXI