| ( | 1 | + | m | ÷ | 2 100 | ) | ( | 1 | + | m | ) | = | 660 |
| Left side of the equation = | 1 | ( | 1 | + | m | ) | + | m | ÷ | 2 100 | × | ( | 1 | + | m | ) |
| = | 1 | × | 1 | + | 1 | m | + | m | × | 100 2 | ( | 1 | + | m | ) |
| = | 1 | + | 1 | m | + | m | × | 100 2 | ( | 1 | + | m | ) |
| = | 1 | + | 1 | m | + | m | × | 100 2 | × | 1 | + | m | × | 100 2 | m |
| = | 1 | + | 1 | m | + | m | × | 50 | + | m | × | 100 2 | m |
| = | 1 | + | 51 | m | + | m | × | 100 2 | m |
| 1 | + | 51 | m | + | m | × | 100 2 | m | = | 660 |