| x | × | 3999 4000 | − | 12557 100 | × | 4001 4000 | = | 2 | ÷ | 10 |
| 方程左边 = | x | × | 3999 4000 | − | 50240557 400000 |
3999 4000 | x | − | 50240557 400000 | = | 2 | ÷ | 10 |
| 方程右边 = | 1 5 |
3999 4000 | x | − | 50240557 400000 | = | 1 5 |
3999 4000 | x | = | 1 5 | + | 50240557 400000 |
3999 4000 | x | = | 50320557 400000 |
| x | = | 50320557 400000 | ÷ | 3999 4000 |
| = | 50320557 400000 | × | 4000 3999 |
| = | 16773519 100 | × | 1 1333 |
| x | = | 16773519 133300 |
| x | = | 125.832851 |