I'm having a hard time with this question: You're prepared to make monthly payments of $85, beginning at the end of this month, into an account that...

I'm having a hard time with this question:You’re prepared to make monthly payments of $85, beginning at the end of this month, into an account that pays 10 percent interest compounded monthly. When your account balance reaches $9,944 you will have made ___ correct payments.I know the answer is 82 but I'm not sure how to come up with the answer.