Convert from Roman (Rom) to Decimal (Base 10)

¿How to convert from Roman (Rom) to Decimal (Base 10)?

Note: To convert a number in the Roman numeral system to any other base, we first need to convert the Roman numeral to decimal (base 10). Follow these steps:

Roman Numerals and Their Basic Rules.

1. The Roman numerals I, X, C, and M can be repeated up to three times when writing a composite Roman numeral.
2. The Roman numerals V, L, and D cannot be repeated.
3. If a composite Roman numeral has a smaller number to the right than to the left, then both are added. Example: XI: The number on the right (I = 1) is smaller than on the left (X = 10), so they are added, i.e., XI = 11.
4. If a composite Roman numeral has a larger number to the right and it is I, X, or C, then the left is subtracted from the right. Example: IX: The number on the right (X = 10) is larger than on the left (I = 1), and it's I, so the left is subtracted from the right, i.e., IX = 9.
5. If a Roman numeral has a line over it, its value is multiplied by a thousand. Example: IX

   : the number is 9,000, as it's the Roman numeral representing 9 and the line over it multiplies it by a thousand.

Applying the steps to the Roman numeral "CLIX":

1. C = 100, L = 50, I = 1, X = 10
2. We observe I = 1 before X = 10, so I is subtracted from X;
3. Add 100 + 50 + (10 - 1) = 159.

The Roman numeral "CLIX" is equivalent to 159 in decimal.