| 991 | x | 1 | = | 991 |
| 991 | x | 2 | = | 1982 |
| 991 | x | 3 | = | 2973 |
| 991 | x | 4 | = | 3964 |
| 991 | x | 5 | = | 4955 |
| 991 | x | 6 | = | 5946 |
| 991 | x | 7 | = | 6937 |
| 991 | x | 8 | = | 7928 |
| 991 | x | 9 | = | 8919 |
| 991 | x | 10 | = | 9910 |
| 991 | x | 11 | = | 10901 |
| 991 | x | 12 | = | 11892 |
| 991 | x | 13 | = | 12883 |
| 991 | x | 14 | = | 13874 |
| 991 | x | 15 | = | 14865 |
| 991 | x | 16 | = | 15856 |
| 991 | x | 17 | = | 16847 |
| 991 | x | 18 | = | 17838 |
| 991 | x | 19 | = | 18829 |
| 991 | x | 20 | = | 19820 |
| 991 | x | 21 | = | 20811 |
| 991 | x | 22 | = | 21802 |
| 991 | x | 23 | = | 22793 |
| 991 | x | 24 | = | 23784 |
| 991 | x | 25 | = | 24775 |
| 991 | x | 26 | = | 25766 |
| 991 | x | 27 | = | 26757 |
| 991 | x | 28 | = | 27748 |
| 991 | x | 29 | = | 28739 |
| 991 | x | 30 | = | 29730 |