| 3645 | = | X | ( | X | + | 2 | ) | ( | X | + | 4 | ) | ( | X | + | 6 | ) |
| Right side of the equation = | X | X | ( | X | + | 4 | ) | ( | X | + | 6 | ) | + | X | × | 2 | ( | X | + | 4 | ) | ( | X | + | 6 | ) |
| = | X | X | X | ( | X | + | 6 | ) | + | X | X | × | 4 | ( | X | + | 6 | ) | + | X | × | 2 | ( | X | + | 4 | ) | ( | X | + | 6 | ) |
| = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | ( | X | + | 6 | ) |
| = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | X |
| = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | X |
| = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | X |
| = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | X |
| = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | X |
| = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | X |
| = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | X |
| = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | X |
| 3645 | = | X | X | X | X | + | X | X | X | × | 6 | + | X | X | × | 4 | X |