| 7693200 | + | A | × | 969 10000 | + | A | × | 1 100 | = | A |
| 方程左边 = | 7693200 | + | 1069 10000 | A |
| 7693200 | + | 1069 10000 | A | = | A |
1069 10000 | A | − | A | = | - | 7693200 |
| - | 8931 10000 | A | = | - | 7693200 |
| 7693200 | = | 8931 10000 | A |
8931 10000 | A | = | 7693200 |
| A | = | 7693200 | ÷ | 8931 10000 |
| = | 7693200 | × | 10000 8931 |
| = | 2564400 | × | 10000 2977 |
| A | = | 25644000000 2977 |