The benchmark interest rate of provident fund with matching principal and interest repayment for more than five years is 3.25%, and the loan is 6,543.8+0.2 million yuan, with a term of 30 years. The monthly repayment amount of matching principal and interest is 52,248 yuan, and the total repayment amount is 6,543.8+0.880098 million yuan, of which the total interest is 680,098 yuan.

The benchmark interest rate of the provident fund with equal principal repayment for more than five years is 3.25%, the loan is 6,543.8+0.2 million yuan, the term is 30 years, and the monthly principal repayment amount is 6,543.8+0.2 million yuan /360 months = 3,333 yuan. The interest rate algorithm for the first month is:1.20,000× 3.25% ÷12 = 3250 yuan, so the repayment amount for the first month is 3333+3250=6583 yuan. The interest rate in the second month is (1.20,000-3333) × 3.25% ÷12 = 3241yuan, and the repayment amount in the second month is 3333+324 1=6574 yuan. By analogy, the monthly repayment amount will gradually decrease.