| ( | 8430 | + | 25 | + | X | ) | ( | 532467 10000000 | + | 3 200 | ) | × | 1 | ÷ | 4 | = | X |
| 方程左边 = | ( | 8430 | + | 25 | + | X | ) | ( | 532467 10000000 | + | 3 200 | ) | × | 1 4 |
| ( | 8430 | + | 25 | + | X | ) | ( | 532467 10000000 | + | 3 200 | ) | × | 1 4 | = | X |
| 方程左边 = | 8430 | ( | 532467 10000000 | + | 3 200 | ) | × | 1 4 | + | 25 | ( | 532467 10000000 | + | 3 200 | ) | × | 1 4 | + | X | ( | 532467 10000000 | + | 3 200 | ) | × | 1 4 |
| = | 4215 2 | ( | 532467 10000000 | + | 3 200 | ) | + | 25 4 | ( | 532467 10000000 | + | 3 200 | ) | + | X | ( | 532467 10000000 | + | 3 200 | ) | × | 1 4 |
| = | 4215 2 | × | 532467 10000000 | + | 4215 2 | × | 3 200 | + | 25 4 | ( | 532467 10000000 | + | 3 200 | ) | + | X | ( | 532467 10000000 | + | 3 200 | ) | × | 1 4 |
| = | 448869681 4000000 | + | 2529 80 | + | 25 4 | ( | 532467 10000000 | + | 3 200 | ) | + | X | ( | 532467 10000000 | + | 3 200 | ) | × | 1 4 |