每期有還些本金，所以就本金降低，利息也降低
利息 本金 剩餘借款
1 1,582 4,548 185,452
2 1,544 4,586 180,866
3 1,506 4,624 176,242
4 1,467 4,663 171,579
5 1,428 4,701 166,878
6 1,389 4,741 162,137
7 1,350 4,780 157,357
8 1,310 4,820 152,537
9 1,270 4,860 147,677
10 1,229 4,900 142,777
11 1,189 4,941 137,835
12 1,147 4,982 132,853
13 1,106 5,024 127,829
14 1,064 5,066 122,763
15 1,022 5,108 117,655
16 979 5,150 112,505
17 937 5,193 107,312
18 893 5,237 102,075
19 850 5,280 96,795
20 806 5,324 91,471
21 761 5,368 86,103
22 717 5,413 80,690
23 672 5,458 75,232
24 626 5,504 69,728
25 580 5,549 64,179
26 534 5,596 58,583
27 488 5,642 52,941
28 441 5,689 47,252
29 393 5,737 41,515
30 346 5,784 35,731
31 297 5,832 29,899
32 249 5,881 24,018
33 200 5,930 18,088
34 151 5,979 12,108
35 101 6,029 6,079
36 51 6,079 0