| X | = | 770 | × | 1 10 | ÷ | ( | 513 50 | × | 1 1000000 | × | 7500 | × | 8 | ) |
| 方程两边同时乘以: | ( | 513 50 | × | 1 1000000 | × | 7500 | × | 8 | ) |
| X | ( | 513 50 | × | 1 1000000 | × | 7500 | × | 8 | ) | = | 770 | × | 1 10 |
| X | × | 513 50 | × | 1 1000000 | × | 7500 | × | 8 | = | 770 | × | 1 10 |
| X | × | 1539 2500 | = | 77 |
| X | = | 77 | ÷ | 1539 2500 |
| = | 77 | × | 2500 1539 |
| X | = | 192500 1539 |
| X | = | 125.081222 |