Financial planning exercises, please ask experts for answers: Mr. Zhang borrowed 400,000 from the bank to buy a house for 10 years, using the equal principal and interest repayment method, assuming the loan interest rate is 6.

This question is about calculating an annuity with a typical known initial value. The formula is A=P(A/P, 6, 120), that is, 120 periods in 10 years, and the annual loan interest rate is 6, then the monthly The loan interest rate (each period) is 6/12=0.5, the principal and interest to be repaid in each period is 4440.82 yuan, the first period interest is 400000*0.5=2000 yuan, and the second period interest is (400000-(4440.82-2000))*0.5 =1987.80 yuan, the third period interest is (400000--(4440.82-2000)-(4440.82-1987.80))*0.5=1975.53 yuan, the fourth period interest is (400000--(4440.82-2000)-(4440.82-1987.80) )-(4440.82-1975.53))*0.5=1963.20 yuan,..., and so on, until the 20th period, so it is known that the interest paid in the 20th period is 2000.00 1987.80 1975.53 1963.20 1950.82 1938.37 1925.85 1913.2 8 1900.64 1887.94 1875.18 1862.35 1849.46 1836.50 1823.48 1810.39 1797.24 1784.02 1770.74 1757.39=37610.18 yuan