+---+---+---+---+---+---+---+---+---+---+
| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
+---+---+---+---+---+---+---+---+---+---+
| 1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
+---+---+---+---+---+---+---+---+---+---+
| 2 | 2 | 4 | 6 | 8 |10 |12 |14 |16 |18 |
+---+---+---+---+---+---+---+---+---+---+
| 3 | 3 | 6 | 9 |12 |15 |18 |21 |24 |27 |
+---+---+---+---+---+---+---+---+---+---+