Tabla del 2121
| 2121 | X | 1 | = | 2121 |
| 2121 | X | 2 | = | 4242 |
| 2121 | X | 3 | = | 6363 |
| 2121 | X | 4 | = | 8484 |
| 2121 | X | 5 | = | 10605 |
| 2121 | X | 6 | = | 12726 |
| 2121 | X | 7 | = | 14847 |
| 2121 | X | 8 | = | 16968 |
| 2121 | X | 9 | = | 19089 |
| 2121 | X | 10 | = | 21210 |
| 2121 | X | 1 | = | 2121 |
| 2121 | X | 2 | = | 4242 |
| 2121 | X | 3 | = | 6363 |
| 2121 | X | 4 | = | 8484 |
| 2121 | X | 5 | = | 10605 |
| 2121 | X | 6 | = | 12726 |
| 2121 | X | 7 | = | 14847 |
| 2121 | X | 8 | = | 16968 |
| 2121 | X | 9 | = | 19089 |
| 2121 | X | 10 | = | 21210 |