| ( | 7143 10 | + | 1857 10 | k | ) | ( | 515 2 | − | 289 50 | k | ) | = | 32143 1000 | × | 14299 20 | k |
| 方程左边 = | 7143 10 | ( | 515 2 | − | 289 50 | k | ) | + | 1857 10 | k | ( | 515 2 | − | 289 50 | k | ) |
| = | 7143 10 | × | 515 2 | − | 7143 10 | × | 289 50 | k | + | 1857 10 | k | ( | 515 2 | − | 289 50 | k | ) |
| = | 735729 4 | − | 2064327 500 | k | + | 1857 10 | k | ( | 515 2 | − | 289 50 | k | ) |
| = | 735729 4 | − | 2064327 500 | k | + | 1857 10 | k | × | 515 2 | − | 1857 10 | k | × | 289 50 | k |
| = | 735729 4 | − | 2064327 500 | k | + | 191271 4 | k | − | 536673 500 | k | k |
| = | 735729 4 | + | 5461137 125 | k | − | 536673 500 | k | k |
735729 4 | + | 5461137 125 | k | − | 536673 500 | k | k | = | 32143 1000 | × | 14299 20 | k |
| 方程右边 = | 459612757 20000 | k |
735729 4 | + | 5461137 125 | k | − | 536673 500 | k | k | = | 459612757 20000 | k |