1 10 | x | ÷ | 21 20 | × | 1 20 | = | x | − | 818400 |
| Left side of the equation = | 1 210 | x |
1 210 | x | = | x | − | 818400 |
1 210 | x | − | x | = | - | 818400 |
| - | 209 210 | x | = | - | 818400 |
| 818400 | = | 209 210 | x |
209 210 | x | = | 818400 |
| x | = | 818400 | ÷ | 209 210 |
| = | 818400 | × | 210 209 |
| = | 74400 | × | 210 19 |
| x | = | 15624000 19 |
| x | = | 822315.789474 |