9 10 | X | − | X | ÷ | 109 100 | × | 9 100 | − | X | ÷ | 109 100 | × | 9 100 | × | 3 25 | = | 5102041 100 |
| 方程左边 = | 9 10 | X | − | X | × | 9 109 | − | X | × | 27 2725 |
| = | 4401 5450 | X |
4401 5450 | X | = | 5102041 100 |
| X | = | 5102041 100 | ÷ | 4401 5450 |
| = | 5102041 100 | × | 5450 4401 |
| = | 5102041 2 | × | 109 4401 |
| X | = | 556122469 8802 |
| X | = | 63181.37571 |