| 128 | ( | 1 | + | a | ) | ( | 1 | + | a | ) | = | 608 |
| Left side of the equation = | 128 | × | 1 | ( | 1 | + | a | ) | + | 128 | a | ( | 1 | + | a | ) |
| = | 128 | ( | 1 | + | a | ) | + | 128 | a | ( | 1 | + | a | ) |
| = | 128 | × | 1 | + | 128 | a | + | 128 | a | ( | 1 | + | a | ) |
| = | 128 | + | 128 | a | + | 128 | a | ( | 1 | + | a | ) |
| = | 128 | + | 128 | a | + | 128 | a | × | 1 | + | 128 | a | a |
| = | 128 | + | 128 | a | + | 128 | a | + | 128 | a | a |
| = | 128 | + | 256 | a | + | 128 | a | a |
| 128 | + | 256 | a | + | 128 | a | a | = | 608 |