| 3170000 | × | 801 4 | = | 191 10 | × | 400 | x | ( | 1 2 | x | − | 45 | ) | − | 10851 50 |
| 方程左边 = | 634792500 |
| 634792500 | = | 191 10 | × | 400 | x | ( | 1 2 | x | − | 45 | ) | − | 10851 50 |
| 方程右边 = | 7640 | x | ( | 1 2 | x | − | 45 | ) | − | 10851 50 |
| 634792500 | = | 7640 | x | ( | 1 2 | x | − | 45 | ) | − | 10851 50 |
| 方程右边 = | 7640 | x | × | 1 2 | x | − | 7640 | x | × | 45 | − | 10851 50 |
| = | 3820 | x | x | − | 343800 | x | − | 10851 50 |
| 634792500 | = | 3820 | x | x | − | 343800 | x | − | 10851 50 |