| 1620000000 | − | 1701000 | × | 1 | = | ( | 4835250 | − | 510300 | a | × | 1 | + | 2268000 | ) | × | 215 |
| Left side of the equation = | 1620000000 | − | 1701000 |
| = | 1618299000 |
| 1618299000 | = | ( | 4835250 | − | 510300 | a | × | 1 | + | 2268000 | ) | × | 215 |
| Right side of the equation = | 4835250 | × | 215 | − | 510300 | a | × | 1 | × | 215 | + | 2268000 | × | 215 |
| = | 1039578750 | − | 109714500 | a | + | 487620000 |
| = | 1527198750 | − | 109714500 | a |
| 1618299000 | = | 1527198750 | − | 109714500 | a |
| 109714500 | a | = | 1527198750 | − | 1618299000 |
| 109714500 | a | = | - | 91100250 |
| a | = | - | 91100250 | ÷ | 109714500 |
| = | - | 91100250 | × | 1 109714500 |
| = | - | 40489 | × | 1 48762 |
| a | = | - | 40489 48762 |
| a | = | - 0.830339 |