Rongcheng Credit Cooperative loaned 654.38 million yuan, which was cost-effective in three years. The loan in the rural credit cooperatives is 654.38 million yuan, which will be paid off in three years. The three-year benchmark interest rate is 6.65%, a little more than 9%, which should be 40% higher, and the interest rate is 9.3 1%. The monthly interest is 776 yuan. Bank interest calculation method: the deposit and loan interest rates are uniformly stipulated by the state and published by the People's Bank of China. Interest rate, also known as interest rate, is the ratio of interest to principal on a certain date, which is divided into annual interest rate, monthly interest rate and daily interest rate. The annual interest rate is expressed as a percentage, the monthly interest rate is expressed as one thousandth and the daily interest rate is expressed as one thousandth.