Talen 2315 till 2321 i romerska siffror
I högerkolumnen visas hur varje romersk siffra bidrar till att man hamnar vid rätt tal.
| 2315 | = | MMCCCXV | = | 1000 + 1000 + 100 + 100 + 100 + 10 + 5 |
| 2316 | = | MMCCCXVI | = | 1000 + 1000 + 100 + 100 + 100 + 10 + 5 + 1 |
| 2317 | = | MMCCCXVII | = | 1000 + 1000 + 100 + 100 + 100 + 10 + 5 + 1 + 1 |
| 2318 | = | MMCCCXVIII | = | 1000 + 1000 + 100 + 100 + 100 + 10 + 5 + 1 + 1 + 1 |
| 2319 | = | MMCCCXIX | = | 1000 + 1000 + 100 + 100 + 100 + 10 + 10 − 1 |
| 2320 | = | MMCCCXX | = | 1000 + 1000 + 100 + 100 + 100 + 10 + 10 |
| 2321 | = | MMCCCXXI | = | 1000 + 1000 + 100 + 100 + 100 + 10 + 10 + 1 |