Talen 3415 till 3421 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 3415 | = | MMMCDXV | = | 1000 + 1000 + 1000 + 500 − 100 + 10 + 5 |
| 3416 | = | MMMCDXVI | = | 1000 + 1000 + 1000 + 500 − 100 + 10 + 5 + 1 |
| 3417 | = | MMMCDXVII | = | 1000 + 1000 + 1000 + 500 − 100 + 10 + 5 + 1 + 1 |
| 3418 | = | MMMCDXVIII | = | 1000 + 1000 + 1000 + 500 − 100 + 10 + 5 + 1 + 1 + 1 |
| 3419 | = | MMMCDXIX | = | 1000 + 1000 + 1000 + 500 − 100 + 10 + 10 − 1 |
| 3420 | = | MMMCDXX | = | 1000 + 1000 + 1000 + 500 − 100 + 10 + 10 |
| 3421 | = | MMMCDXXI | = | 1000 + 1000 + 1000 + 500 − 100 + 10 + 10 + 1 |