| 1331 | = | 719 | ( | 1 | − | ( | x | x | ) | ÷ | ( | 11400 | × | 11400 | ) | ) |
| 1331 | = | 719 | × | 1 | − | 719 | ( | x | x | ) | ÷ | ( | 11400 | × | 11400 | ) |
| 1331 | = | 719 | − | 719 | ( | x | x | ) | ÷ | ( | 11400 | × | 11400 | ) |
| 方程两边同时乘以: | ( | 11400 | × | 11400 | ) |
| 1331 | ( | 11400 | × | 11400 | ) | = | 719 | ( | 11400 | × | 11400 | ) | − | 719 | ( | x | x | ) |
| 1331 | × | 11400 | × | 11400 | = | 719 | ( | 11400 | × | 11400 | ) | − | 719 | ( | x | x | ) |
| 1331 | × | 11400 | × | 11400 | = | 719 | × | 11400 | × | 11400 | − | 719 | ( | x | x | ) |