| 500 | ( | 1 | + | X | ) | X | × | 1000 | ( | 1 | + | 1 2 | X | ) | = | 660000 |
| Left side of the equation = | 500000 | ( | 1 | + | X | ) | X | ( | 1 | + | 1 2 | X | ) |
| 500000 | ( | 1 | + | X | ) | X | ( | 1 | + | 1 2 | X | ) | = | 660000 |
| Left side of the equation = | 500000 | × | 1 | X | ( | 1 | + | 1 2 | X | ) | + | 500000 | X | X | ( | 1 | + | 1 2 | X | ) |
| = | 500000 | X | ( | 1 | + | 1 2 | X | ) | + | 500000 | X | X | ( | 1 | + | 1 2 | X | ) |
| = | 500000 | X | × | 1 | + | 500000 | X | × | 1 2 | X | + | 500000 | X | X | ( | 1 | + | 1 2 | X | ) |
| = | 500000 | X | + | 250000 | X | X | + | 500000 | X | X | ( | 1 | + | 1 2 | X | ) |
| = | 500000 | X | + | 250000 | X | X | + | 500000 | X | X | × | 1 | + | 500000 | X | X |
| = | 500000 | X | + | 250000 | X | X | + | 500000 | X | X | + | 250000 | X | X | X |
| 500000 | X | + | 250000 | X | X | + | 500000 | X | X | + | 250000 | X | X | X | = | 660000 |