| 252 | × | 252 | ÷ | 316 | ÷ | 316 | × | ( | 1 | − | x | x | ) | = | 15707963 5000000 | x | × | 15707963 5000000 | x |
| 方程左边 = | 3969 6241 | ( | 1 | − | x | x | ) |
3969 6241 | ( | 1 | − | x | x | ) | = | 15707963 5000000 | x | × | 15707963 5000000 | x |
| 方程左边 = | 3969 6241 | × | 1 | − | 3969 6241 | x | x |
| = | 3969 6241 | − | 3969 6241 | x | x |
3969 6241 | − | 3969 6241 | x | x | = | 15707963 5000000 | x | × | 15707963 5000000 | x |