Assume that the annual interest rate of the loan is 4.90%. In this case, it will take about 13 years to repay the loan.

According to the calculation of the mortgage calculator: the mortgage is 460,000 yuan, and the equal principal and interest are repaid about 4,000 yuan per month, the total interest is 162,867.78 yuan, and the total cumulative repayment is 622,867.78 yuan.

In the equal principal and interest repayment method, the principal increases month by month, the interest decreases month by month, and the monthly payment amount remains unchanged; the interest in the early stage of repayment accounts for the majority of the monthly payment, and the payment is gradually returned with the principal. The proportion of principal in the fund increased. However, the monthly repayment amount of this method is fixed, which can control the expenditure of family income in a planned way, and also facilitates each family to determine the loan repayment ability based on their own income.