| 990 | x | 1 | = | 990 |
| 990 | x | 2 | = | 1980 |
| 990 | x | 3 | = | 2970 |
| 990 | x | 4 | = | 3960 |
| 990 | x | 5 | = | 4950 |
| 990 | x | 6 | = | 5940 |
| 990 | x | 7 | = | 6930 |
| 990 | x | 8 | = | 7920 |
| 990 | x | 9 | = | 8910 |
| 990 | x | 10 | = | 9900 |
| 990 | x | 11 | = | 10890 |
| 990 | x | 12 | = | 11880 |
| 990 | x | 13 | = | 12870 |
| 990 | x | 14 | = | 13860 |
| 990 | x | 15 | = | 14850 |
| 990 | x | 16 | = | 15840 |
| 990 | x | 17 | = | 16830 |
| 990 | x | 18 | = | 17820 |
| 990 | x | 19 | = | 18810 |
| 990 | x | 20 | = | 19800 |
| 990 | x | 21 | = | 20790 |
| 990 | x | 22 | = | 21780 |
| 990 | x | 23 | = | 22770 |
| 990 | x | 24 | = | 23760 |
| 990 | x | 25 | = | 24750 |
| 990 | x | 26 | = | 25740 |
| 990 | x | 27 | = | 26730 |
| 990 | x | 28 | = | 27720 |
| 990 | x | 29 | = | 28710 |
| 990 | x | 30 | = | 29700 |