10,077.60 yuan. 30,000 yuan is divided into 3 installments. If calculated according to the loan annual interest rate LPR4.65, the total interest is ***232.80 yuan, the total repayment is 30,232.80 yuan, and the monthly payment is 10,077.60 yuan. Therefore, if you pay 30,000 yuan on a credit card in three monthly installments, you can pay 10,077.60 yuan a month.