Interest = principal * interest rate * number of interest periods. If 690,000 yuan is deposited in the bank 1 year, the annual interest rate is 5.3%, and the corresponding interest due is 690,000 * 5.3% *112 = 3047.5 yuan.
390000 * 5.3% *112 =1722.5 yuan.
3047.5-1722.5 =1325 yuan. That is, less 1325 yuan per month.