Talen 1866 till 1872 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 1866 | = | MDCCCLXVI | = | 1000 + 500 + 100 + 100 + 100 + 50 + 10 + 5 + 1 |
| 1867 | = | MDCCCLXVII | = | 1000 + 500 + 100 + 100 + 100 + 50 + 10 + 5 + 1 + 1 |
| 1868 | = | MDCCCLXVIII | = | 1000 + 500 + 100 + 100 + 100 + 50 + 10 + 5 + 1 + 1 + 1 |
| 1869 | = | MDCCCLXIX | = | 1000 + 500 + 100 + 100 + 100 + 50 + 10 + 10 − 1 |
| 1870 | = | MDCCCLXX | = | 1000 + 500 + 100 + 100 + 100 + 50 + 10 + 10 |
| 1871 | = | MDCCCLXXI | = | 1000 + 500 + 100 + 100 + 100 + 50 + 10 + 10 + 1 |
| 1872 | = | MDCCCLXXII | = | 1000 + 500 + 100 + 100 + 100 + 50 + 10 + 10 + 1 + 1 |