| ( | ( | 29600 | − | 10 | A | ) | + | ( | 32600 | − | 11 | A | ) | + | ( | 35900 | − | 121 10 | A | ) | ) | × | 3 4 | = | 17520 |
| 方程左边 = | ( | 29600 | − | 10 | A | ) | × | 3 4 | + | ( | 32600 | − | 11 | A | ) | × | 3 4 | + | ( | 35900 | − | 121 10 | A | ) | × | 3 4 |
| = | 29600 | × | 3 4 | − | 10 | A | × | 3 4 | + | ( | 32600 | − | 11 | A | ) | × | 3 4 | + | ( | 35900 | − | 121 10 | A | ) | × | 3 4 |
| = | 22200 | − | 15 2 | A | + | ( | 32600 | − | 11 | A | ) | × | 3 4 | + | ( | 35900 | − | 121 10 | A | ) | × | 3 4 |
| = | 22200 | − | 15 2 | A | + | 32600 | × | 3 4 | − | 11 | A | × | 3 4 | + | ( | 35900 | − | 121 10 | A | ) | × | 3 4 |
| = | 22200 | − | 15 2 | A | + | 24450 | − | 33 4 | A | + | ( | 35900 | − | 121 10 | A | ) | × | 3 4 |
| = | 46650 | − | 63 4 | A | + | ( | 35900 | − | 121 10 | A | ) | × | 3 4 |
| = | 46650 | − | 63 4 | A | + | 35900 | × | 3 4 | − | 121 10 | A | × | 3 4 |
| = | 46650 | − | 63 4 | A | + | 26925 | − | 363 40 | A |
| = | 73575 | − | 993 40 | A |
| 73575 | − | 993 40 | A | = | 17520 |
| - | 993 40 | A | = | 17520 | − | 73575 |
| - | 993 40 | A | = | - | 56055 |
| 56055 | = | 993 40 | A |
993 40 | A | = | 56055 |
| A | = | 56055 | ÷ | 993 40 |
| = | 56055 | × | 40 993 |
| = | 18685 | × | 40 331 |
| A | = | 747400 331 |
| A | = | 2258.006042 |