| 20 | X | 1 | = | 20 |
| 20 | X | 2 | = | 40 |
| 20 | X | 3 | = | 60 |
| 20 | X | 4 | = | 80 |
| 20 | X | 5 | = | 100 |
| 20 | X | 6 | = | 120 |
| 20 | X | 7 | = | 140 |
| 20 | X | 8 | = | 160 |
| 20 | X | 9 | = | 180 |
| 20 | X | 10 | = | 200 |
| 20 | X | 11 | = | 220 |
| 20 | X | 12 | = | 240 |
| 20 | X | 13 | = | 260 |
| 20 | X | 14 | = | 280 |
| 20 | X | 15 | = | 300 |
| 20 | X | 16 | = | 320 |
| 20 | X | 17 | = | 340 |
| 20 | X | 18 | = | 360 |
| 20 | X | 19 | = | 380 |
| 20 | X | 20 | = | 400 |