90 | X | 1 | = | 90 |
90 | X | 2 | = | 180 |
90 | X | 3 | = | 270 |
90 | X | 4 | = | 360 |
90 | X | 5 | = | 450 |
90 | X | 6 | = | 540 |
90 | X | 7 | = | 630 |
90 | X | 8 | = | 720 |
90 | X | 9 | = | 810 |
90 | X | 10 | = | 900 |
90 | X | 11 | = | 990 |
90 | X | 12 | = | 1080 |
90 | X | 13 | = | 1170 |
90 | X | 14 | = | 1260 |
90 | X | 15 | = | 1350 |
90 | X | 16 | = | 1440 |
90 | X | 17 | = | 1530 |
90 | X | 18 | = | 1620 |
90 | X | 19 | = | 1710 |
90 | X | 20 | = | 1800 |