| 219 | × | 219 | ÷ | 321 | ÷ | 321 | × | ( | 1 | − | x | x | ) | = | 15707963 5000000 | x | × | 15707963 5000000 | x |
| 方程左边 = | 5329 11449 | ( | 1 | − | x | x | ) |
5329 11449 | ( | 1 | − | x | x | ) | = | 15707963 5000000 | x | × | 15707963 5000000 | x |
| 方程左边 = | 5329 11449 | × | 1 | − | 5329 11449 | x | x |
| = | 5329 11449 | − | 5329 11449 | x | x |
5329 11449 | − | 5329 11449 | x | x | = | 15707963 5000000 | x | × | 15707963 5000000 | x |