21517 25 | × | 1000 | × | 7057 10 | = | 253 10 | × | 1200 | a | ( | 300 | − | 1 2 | a | ) | + | 360 | × | 882 | × | 250 |
| Left side of the equation = | 607381876 |
| 607381876 | = | 253 10 | × | 1200 | a | ( | 300 | − | 1 2 | a | ) | + | 360 | × | 882 | × | 250 |
| Right side of the equation = | 30360 | a | ( | 300 | − | 1 2 | a | ) | + | 79380000 |
| 607381876 | = | 30360 | a | ( | 300 | − | 1 2 | a | ) | + | 79380000 |
| Right side of the equation = | 30360 | a | × | 300 | − | 30360 | a | × | 1 2 | a | + | 79380000 |
| = | 9108000 | a | − | 15180 | a | a | + | 79380000 |
| 607381876 | = | 9108000 | a | − | 15180 | a | a | + | 79380000 |