| 1000 | i | × | 1939 625 | + | 119723 100 | × | 6587 10000 | = | 1000 |
| 方程左边 = | 15512 5 | i | + | 788615401 1000000 |
15512 5 | i | + | 788615401 1000000 | = | 1000 |
15512 5 | i | = | 1000 | − | 788615401 1000000 |
15512 5 | i | = | 211384599 1000000 |
| i | = | 211384599 1000000 | ÷ | 15512 5 |
| = | 211384599 1000000 | × | 5 15512 |
| = | 211384599 200000 | × | 1 15512 |
| i | = | 211384599 3102400000 |
| i | = | 0.068136 |