Huaxia Bank credit card installment interest = installment amount * installment interest rate * installment number.

Huaxia Bank's credit card installment number includes: 1 installment: 1.5%/ installment; 3 periods: 0.85%/ period; 6 periods: 0.75%/ period; 9. 12, 15, 18, 2 1, 24, 36: 0.7%/ period.

For example, if a user borrows 65,438+00,000 yuan and repays it in six installments, the total interest generated by 65,438+00,000 * 0.75% * 6 = 450 yuan.