323 100 | × | 323 100 | + | ( | r | r | − | 49 50 | × | 49 50 | ) | = | r | r |
| 方程左边 = | 104329 10000 | + | ( | r | r | − | 49 50 | × | 49 50 | ) |
104329 10000 | + | ( | r | r | − | 49 50 | × | 49 50 | ) | = | r | r |
| 方程左边 = | 104329 10000 | + | r | r | − | 49 50 | × | 49 50 |
| = | 104329 10000 | + | r | r | − | 2401 2500 |
| = | 3789 400 | + | r | r |
3789 400 | + | r | r | = | r | r |