| 1 x 1 | = | 1 |
| 11 x 11 | = | 121 |
| 111 x 111 | = | 12.321 |
| 1.111 x 1.111 | = | 1.234.321 |
| 11.111 x 11.111 | = | 123.454.321 |
| 111.111 x 111.111 | = | 12.345.654.321 |
| 1.111.111 x 1.111.111 | = | 1.234.567.654.321 |
| 11.111.111 x 11.111.111 | = | 123.456.787.654.321 |
| 111.111.111 x 111.111.111 | = | 12.345.678.987.654.321 |
ini yang kedua
| 1 x 8 + 1 | = | 9 |
| 12 x 8 + 2 | = | 98 |
| 123 x 8 + 3 | = | 987 |
| 1.234 x 8 + 4 | = | 9.876 |
| 12.345 x 8 + 5 | = | 98.765 |
| 123.456 x 8 + 6 | = | 987.654 |
| 1.234.567 x 8 + 7 | = | 9.876.543 |
| 12.345.678 x 8 + 8 | = | 98.765.432 |
| 123.456.789 x 8 + 9 | = | 987.654.321 |