| 2520000000 | = | 143 10 | × | 500 | x | ( | 1130 | − | x | ÷ | 2 | ) | + | 360 | × | 1964 | ( | 1130 | − | 40 | ) |
| 方程右边 = | 7150 | x | ( | 1130 | − | x | ÷ | 2 | ) | + | 707040 | ( | 1130 | − | 40 | ) |
| 2520000000 | = | 7150 | x | ( | 1130 | − | x | ÷ | 2 | ) | + | 707040 | ( | 1130 | − | 40 | ) |
| 方程右边 = | 7150 | x | × | 1130 | − | 7150 | x | x | ÷ | 2 | + | 707040 | ( | 1130 | − | 40 | ) |
| = | 8079500 | x | − | 3575 | x | x | + | 707040 | ( | 1130 | − | 40 | ) |
| = | 8079500 | x | − | 3575 | x | x | + | 707040 | × | 1130 | − | 707040 | × | 40 |
| = | 8079500 | x | − | 3575 | x | x | + | 798955200 | − | 28281600 |
| = | 8079500 | x | − | 3575 | x | x | + | 770673600 |
| 2520000000 | = | 8079500 | x | − | 3575 | x | x | + | 770673600 |