| x | × | 3999 4000 | − | 12557 100 | × | 4001 4000 | = | 1 | ÷ | 10 |
| Left side of the equation = | x | × | 3999 4000 | − | 50240557 400000 |
3999 4000 | x | − | 50240557 400000 | = | 1 | ÷ | 10 |
| Right side of the equation = | 1 10 |
3999 4000 | x | − | 50240557 400000 | = | 1 10 |
3999 4000 | x | = | 1 10 | + | 50240557 400000 |
3999 4000 | x | = | 50280557 400000 |
| x | = | 50280557 400000 | ÷ | 3999 4000 |
| = | 50280557 400000 | × | 4000 3999 |
| = | 50280557 100 | × | 1 3999 |
| x | = | 50280557 399900 |
| x | = | 125.732826 |