Convert medieval and standard Roman numerals to decimal numbers. Supports both classical and medieval notations.
| M | 1000 |
| D/Q | 500 |
| C | 100 |
| L | 50 |
| F | 40 (Medieval) |
| X | 10 |
| V/A | 5 (A=5) or 500 (A=500) |
| I | 1 |
| O | 11 (Medieval) |
| S/Z | 7 (Medieval) |
| N | 90 (Medieval) |
| P/G | 400 (Rare) |
| B | 300 (Rare) |
| K | 250 (Rare) |
| E | 250 (Rare) |
| Y | 150 (Rare) |