| ( | 38 | + | 2 | x | ) | ( | 26 | + | 2 | x | ) | = | 1408 |
| 方程左边 = | 38 | ( | 26 | + | 2 | x | ) | + | 2 | x | ( | 26 | + | 2 | x | ) |
| = | 38 | × | 26 | + | 38 | × | 2 | x | + | 2 | x | ( | 26 | + | 2 | x | ) |
| = | 988 | + | 76 | x | + | 2 | x | ( | 26 | + | 2 | x | ) |
| = | 988 | + | 76 | x | + | 2 | x | × | 26 | + | 2 | x | × | 2 | x |
| = | 988 | + | 76 | x | + | 52 | x | + | 4 | x | x |
| = | 988 | + | 128 | x | + | 4 | x | x |
| 988 | + | 128 | x | + | 4 | x | x | = | 1408 |