1. The product interest method is to accumulate the account balance every day according to the actual number of days, and calculate the interest by multiplying the accumulated product by the daily interest rate. \xd\ \xd\ The interest calculation formula of the product interest calculation method is: \xd\ Interest = cumulative interest product × daily interest rate. \xd\ where the accumulated interest product = the total daily balance of the account. \xd\ xd \ 2. Calculate product: \ xd \ According to the calculation formula of "product = principal × time", the bank multiplies the deposit and loan balance by the actual deposit and loan days of the deposit and loan balance to make product, and then fills it in the product column of the balance. \xd\3. Calculate the interest on the interest settlement date \ xd \ xd \ On the interest settlement date, the bank will add up the product columns to form the total product, that is, the accumulated product, and multiply the accumulated product by the daily interest rate, which is the accrued interest.