Talen 3121 till 3127 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 3121 | = | MMMCXXI | = | 1000 + 1000 + 1000 + 100 + 10 + 10 + 1 |
| 3122 | = | MMMCXXII | = | 1000 + 1000 + 1000 + 100 + 10 + 10 + 1 + 1 |
| 3123 | = | MMMCXXIII | = | 1000 + 1000 + 1000 + 100 + 10 + 10 + 1 + 1 + 1 |
| 3124 | = | MMMCXXIV | = | 1000 + 1000 + 1000 + 100 + 10 + 10 + 5 − 1 |
| 3125 | = | MMMCXXV | = | 1000 + 1000 + 1000 + 100 + 10 + 10 + 5 |
| 3126 | = | MMMCXXVI | = | 1000 + 1000 + 1000 + 100 + 10 + 10 + 5 + 1 |
| 3127 | = | MMMCXXVII | = | 1000 + 1000 + 1000 + 100 + 10 + 10 + 5 + 1 + 1 |