The principal of the loan is 680,000 yuan, with a term of 27 years. According to the benchmark annual interest rate of the People's Bank of China for loans over 5 years (unchanged), the repayment of principal and interest is equal, with a monthly repayment of 3,788.36 yuan, the total repayment amount is 12429.5438+0, and the total interest amount is 6000.0000606066