Talen 2821 till 2827 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 2821 | = | MMDCCCXXI | = | 1000 + 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 1 |
| 2822 | = | MMDCCCXXII | = | 1000 + 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 1 + 1 |
| 2823 | = | MMDCCCXXIII | = | 1000 + 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 1 + 1 + 1 |
| 2824 | = | MMDCCCXXIV | = | 1000 + 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 5 − 1 |
| 2825 | = | MMDCCCXXV | = | 1000 + 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 5 |
| 2826 | = | MMDCCCXXVI | = | 1000 + 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 5 + 1 |
| 2827 | = | MMDCCCXXVII | = | 1000 + 1000 + 500 + 100 + 100 + 100 + 10 + 10 + 5 + 1 + 1 |