Calculate a three-year loan of 260,000 yuan with an annual interest rate of 2.23%. What is the total interest for three years? Assume that the total loan amount is P (principal), the annual interest rate is R, and the loan term is T years. It is a common calculation method to calculate the total interest with a simple interest formula. The formula of total interest I is: I=P×r×t, where r is the annual interest rate and t is the loan term (year). According to the subject conditions, P=260000, annual interest rate is 2.23% (decimal 0.0223), and the loan period is 3 years, which is calculated by substituting into the formula. The calculation result is: 17394 yuan.

So the total interest for three years is 17394 yuan.