| 1800 | X | X | × | 1 2 | = | 66667 10000 | × | 9161 | ( | 1636 | − | X | ) |
| Left side of the equation = | 900 | X | X |
| 900 | X | X | = | 66667 10000 | × | 9161 | ( | 1636 | − | X | ) |
| Right side of the equation = | 610736387 10000 | ( | 1636 | − | X | ) |
| 900 | X | X | = | 610736387 10000 | ( | 1636 | − | X | ) |
| Right side of the equation = | 610736387 10000 | × | 1636 | − | 610736387 10000 | X |