Two calculation results (10 years later)

First, interest is not included in the principal of the next year. In the first year, it was saved for 10 years, and in the second year, it was saved for 9 years. By analogy, the principal and interest of 1 year is 4w after 10, and the following year is 38,000,36,000,32,000,30,000,28,000,260. The total is 3 10000 yuan.

Second, it will be more complicated if the principal and interest are transferred to the next year. Equivalent to rolling interest.

For the first calculation, add 10% interest on the basis of 31w.

The interest paid in the first year is 2000 (1+ 10%) 9.

The interest paid in the second year is 2000 (1+ 10%) 8.

By the ninth year, the deposit interest is 2000( 1+ 10%).

In the last year, there was only 2000 yuan interest, and there was no compound interest.