To calculate the repayment due for each period of installment repayment, the cardholder first needs to choose how many installments it will be divided into and what the card issuer's handling rate is. Then if the handling fee is charged once per installment, the calculation formula is:

Total installment amount/number of installments Total amount of installments x installment handling rate = repayment per installment

For example, 3,000 yuan is divided into 3 installments, the handling fee is 7 thousandths, and the repayment in each installment is 3,000/3 3000x0.7 = 1,021 yuan.