The annual interest rate of the loan is R, so the annual interest is 654.38+ million times R. When the interest rate is 5%, the annual interest is 5,000 yuan.

The annual cost (i.e. interest) of the loan 1000000 from the rural commercial bank is calculated according to the annual interest rate. Different annual interest rates will lead to different amounts paid within one year. When choosing a loan, the borrower should choose the appropriate annual interest rate according to his repayment ability and loan purpose to avoid economic pressure caused by excessive interest burden.