| A | = | 13881600 | + | 10000000 | × | 1 200 | + | ( | A | − | 10000000 | ) | × | 1 500 | + | A | × | 9 1250 | + | 49 | × | 96 | × | 12 |
| 方程右边 = | 13881600 | + | 50000 | + | ( | A | − | 10000000 | ) | × | 1 500 | + | A | × | 9 1250 | + | 56448 |
| = | 13988048 | + | ( | A | − | 10000000 | ) | × | 1 500 | + | 9 1250 | A |
| A | = | 13988048 | + | ( | A | − | 10000000 | ) | × | 1 500 | + | 9 1250 | A |
| 方程右边 = | 13988048 | + | A | × | 1 500 | − | 10000000 | × | 1 500 | + | 9 1250 | A |
| = | 13988048 | + | A | × | 1 500 | − | 20000 | + | 9 1250 | A |
| = | 13968048 | + | 23 2500 | A |
| A | = | 13968048 | + | 23 2500 | A |
| A | − | 23 2500 | A | = | 13968048 |
2477 2500 | A | = | 13968048 |
| A | = | 13968048 | ÷ | 2477 2500 |
| = | 13968048 | × | 2500 2477 |
| A | = | 34920120000 2477 |