| X | ÷ | 87 | − | 40 | ÷ | 1333 | − | 40 | ÷ | 1650 | = | 71 50000 | ( | X | + | 80 | ) |
| 方程左边 = | X | × | 1 87 | − | 40 1333 | − | 4 165 |
| = | 1 87 | X | − | 11932 219945 |
1 87 | X | − | 11932 219945 | = | 71 50000 | ( | X | + | 80 | ) |
| 方程右边 = | 71 50000 | X | + | 71 50000 | × | 80 |
| = | 71 50000 | X | + | 71 625 |
1 87 | X | − | 11932 219945 | = | 71 50000 | X | + | 71 625 |
1 87 | X | − | 71 50000 | X | = | 71 625 | + | 11932 219945 |
43823 4350000 | X | = | 71 625 | + | 11932 219945 |
43823 4350000 | X | = | 4614719 27493125 |
| X | = | 4614719 27493125 | ÷ | 43823 4350000 |
| = | 4614719 27493125 | × | 4350000 43823 |
| = | 4614719 14663 | × | 2320 43823 |
| X | = | 10706148080 642576649 |