| x | × | 3999 4000 | − | 5401 40 | × | 4001 4000 | = | 1 | ÷ | 10 |
| Left side of the equation = | x | × | 3999 4000 | − | 21609401 160000 |
3999 4000 | x | − | 21609401 160000 | = | 1 | ÷ | 10 |
| Right side of the equation = | 1 10 |
3999 4000 | x | − | 21609401 160000 | = | 1 10 |
3999 4000 | x | = | 1 10 | + | 21609401 160000 |
3999 4000 | x | = | 21625401 160000 |
| x | = | 21625401 160000 | ÷ | 3999 4000 |
| = | 21625401 160000 | × | 4000 3999 |
| = | 7208467 40 | × | 1 1333 |
| x | = | 7208467 53320 |
| x | = | 135.192554 |