6375 1.99 yuan, 59642.74 yuan. If the loan of 3 million yuan is repaid by matching principal and interest, the annual interest rate of the loan of 3 million yuan is 3.9%, and the total interest expenditure for one year is 637,565,438+0.99 yuan; If the interest rate is 3.65%, the total interest for one year is 59,642.74 yuan. Loan interest is usually related to the interest rate, principal and term of the loan. The loan principal multiplied by the loan interest rate and term is the loan interest.