Talen 3980 till 3986 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 3980 | = | MMMCMLXXX | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 |
| 3981 | = | MMMCMLXXXI | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 1 |
| 3982 | = | MMMCMLXXXII | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 1 + 1 |
| 3983 | = | MMMCMLXXXIII | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 1 + 1 + 1 |
| 3984 | = | MMMCMLXXXIV | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 5 − 1 |
| 3985 | = | MMMCMLXXXV | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 5 |
| 3986 | = | MMMCMLXXXVI | = | 1000 + 1000 + 1000 + 1000 − 100 + 50 + 10 + 10 + 10 + 5 + 1 |