Talen 3991 till 3997 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 3991 | = | MMMCMXCI | = | 1000 + 1000 + 1000 + 1000 − 100 + 100 − 10 + 1 |
| 3992 | = | MMMCMXCII | = | 1000 + 1000 + 1000 + 1000 − 100 + 100 − 10 + 1 + 1 |
| 3993 | = | MMMCMXCIII | = | 1000 + 1000 + 1000 + 1000 − 100 + 100 − 10 + 1 + 1 + 1 |
| 3994 | = | MMMCMXCIV | = | 1000 + 1000 + 1000 + 1000 − 100 + 100 − 10 + 5 − 1 |
| 3995 | = | MMMCMXCV | = | 1000 + 1000 + 1000 + 1000 − 100 + 100 − 10 + 5 |
| 3996 | = | MMMCMXCVI | = | 1000 + 1000 + 1000 + 1000 − 100 + 100 − 10 + 5 + 1 |
| 3997 | = | MMMCMXCVII | = | 1000 + 1000 + 1000 + 1000 − 100 + 100 − 10 + 5 + 1 + 1 |