| - | 198 | = | - | 47 400 | × | 1406 | + | b |
| 方程右边 = | - | 33041 200 | + | b |
| - | 198 | = | - | 33041 200 | + | b |
| - | b | = | - | 33041 200 | + | 198 |
| - | b | = | 6559 200 |
| - | 6559 200 | = | b |
| b | = | - | 6559 200 |
| - | 72 | = | - | 2401 10000 | × | 1408 | + | b |
| 方程右边 = | - | 211288 625 | + | b |
| - | 72 | = | - | 211288 625 | + | b |
| - | b | = | - | 211288 625 | + | 72 |
| - | b | = | - | 166288 625 |
166288 625 | = | b |
| b | = | 166288 625 |