Matching principal and interest method: loan principal: 800,000 yuan, assuming annual interest rate: 5.000%, loan life: 5 years; Monthly repayment of principal and interest: 15096.99 yuan, total repayment of principal and interest: 9058 19.4 yuan, * * interest payable: 65438+. The interest paid in 1 month is: 3333.33; The first 1 month principal repayment is11763.66; Since then, the monthly interest repayment amount has decreased and the principal has increased. (without considering the adjustment of interest rate in the middle)