[loan principal × monthly interest rate ×( 1+ monthly interest rate) repayment months ]=[( 1+ monthly interest rate) repayment months-1]
The loan amount is 680,000 yuan.
The loan term is 30 years.
The annual interest rate is 5. 15%.
The total repayment amount is 1336672.2 yuan.
The total interest is 656,672.2 yuan.
Monthly repayment is 3,765,438 yuan +02.98 yuan.