43,200 yuan. 6% interest is equivalent to a monthly interest of 0.66 million yuan. If you borrow it for one month, the interest is 0.6%, which is equal to 3600 yuan. When the monthly interest rate of 0.6% is converted into the annual interest rate of 0.6%, 12 is equal to 7.2%. After one year of loan, the total interest of equal principal and interest repayment is 43,200 yuan, and the total interest of equal principal repayment is 43,200 yuan.