The calculation formula of bank loan interest in Nanjing is: interest = loan amount * loan term * loan interest rate. Generally, to calculate the loan interest of Nanjing Bank, it is necessary to know the loan amount, loan term and loan interest rate, which can be found in the loan contract signed between the borrower and Nanjing Bank. After finding the above data, you can get the loan interest of Nanjing Bank by substituting the above formula.