Talen 1816 till 1822 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 1816 | = | MDCCCXVI | = | 1000 + 500 + 100 + 100 + 100 + 10 + 5 + 1 |
| 1817 | = | MDCCCXVII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 5 + 1 + 1 |
| 1818 | = | MDCCCXVIII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 5 + 1 + 1 + 1 |
| 1819 | = | MDCCCXIX | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 − 1 |
| 1820 | = | MDCCCXX | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 |
| 1821 | = | MDCCCXXI | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 1 |
| 1822 | = | MDCCCXXII | = | 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 1 + 1 |