Deposit 10 thousand in the bank every year for ten years. By the end of the decade, the principal was 654.38 million. In the first year, 65,438+00,000 is 550x65,438+00 = 5,500 {at the interest rate of 5.5% for five years and 5.5% for 10} in the second year, 550x5+425 x3+350 = 4375 {divided into five years. Hehe, you should deposit with an insurance company or buy fund bonds for such a long time. They are compound interest, and banks are simple interest.