The expected annualized rate is 6.80%, which means the yield is one year. Therefore, 57 days should be converted into adulthood, and the unified unit can be calculated. 57 days into adulthood is 57 divided by 365, and then the income is calculated as follows:

Income after 57 days = principal x annualized rate of return x investment period =1000x6.80% x57/365 =10.62 yuan.

According to the fund share and fund net value, the expected return of the fund is calculated as follows: fund redemption amount = fund share * fund unit net value-redemption fee, and the actual expected return is the fund redemption amount minus the fund investment principal.