Explanation:

1. Calculate the monthly loan interest rate: divide the annual interest rate by 12 months to get 0.375%.

2. Calculate the total repayment period: 20 years * * * with 240 months.

3. Calculation of monthly repayment with equal principal and interest: According to the loan amount of 6,543,800 yuan, the monthly interest rate of 0.375% and the repayment period of 240 months, the monthly repayment amount is about 5,936 yuan by using the repayment formula of equal principal and interest.

Formula: monthly repayment amount = (loan principal × monthly interest rate ×( 1+ monthly interest rate )× repayment periods) ÷(( 1+ monthly interest rate )× repayment periods)

Specific calculation process:

Monthly repayment amount = (1 ten thousand yuan × 0.00375× (1+0.00375) 240) ÷ (1+0.00375) 240-1)

≈5935.96 yuan

Extended data:

Matching principal and interest means that within the repayment period, the repayment amount of each installment is the same. Because each repayment amount includes principal and interest, interest accounts for a high proportion in the previous repayment, and gradually decreases in the later period until it is fully paid off. This repayment method is common in long-term loans such as housing loans. Adopting the method of matching principal and interest can facilitate the borrower to arrange the monthly repayment amount reasonably and reduce the repayment pressure.