A and B play a series of similar game. The probability that A will win a set is 3/5, and there is no draw for each set. The game will continue until one of them, A or B win 2 sets. Find the probability that A wins the game.

I can't find any similar example from my reference book, and i also tried searching the internet for similar example but in vain... I attempted this question for like 3hours but also can't get the correct answer... 81/125

Can anyone help me?