| 80 | ( | 1 | − | ( | m | ÷ | 57 | ) | ( | 1 | − | 147 50 | ÷ | 191 50 | ) | ) | = | 3597 50 |
| Left side of the equation = | 80 | × | 1 | − | 80 | ( | m | ÷ | 57 | ) | ( | 1 | − | 147 50 | ÷ | 191 50 | ) |
| = | 80 | − | 80 | ( | m | ÷ | 57 | ) | ( | 1 | − | 147 50 | ÷ | 191 50 | ) |
| = | 80 | − | 80 | m | ÷ | 57 | × | ( | 1 | − | 147 50 | ÷ | 191 50 | ) |
| = | 80 | − | 80 57 | m | ( | 1 | − | 147 50 | ÷ | 191 50 | ) |
| = | 80 | − | 80 57 | m | × | 1 | + | 80 57 | m | × | 147 50 | ÷ | 191 50 |
| = | 80 | − | 80 57 | m | + | 3920 3629 | m |
| = | 80 | − | 3520 10887 | m |
| 80 | − | 3520 10887 | m | = | 3597 50 |
| - | 3520 10887 | m | = | 3597 50 | − | 80 |
| - | 3520 10887 | m | = | - | 403 50 |
403 50 | = | 3520 10887 | m |
3520 10887 | m | = | 403 50 |
| m | = | 403 50 | ÷ | 3520 10887 |
| = | 403 50 | × | 10887 3520 |
| m | = | 4387461 176000 |
| m | = | 24.928756 |