In 2015 the average U.S. household owed about $10,000 in credit card debt, and the average APR on credit card debt was about 13.0 percent compounded monthly. On many credit cards the minimum monthly payment is 4 percent of the debt balance. If the average household paid off 4 percent of the initial amount it owed each month, that is, made payments of $400 each month, how many months would it take to repay this credit card debt? Use a financial calculator to solve this problem.