please solve it

The is wrapping six different gift for six of his friends. He is distracted by his and does not pay much attention to which gift goes into which box. All the boxes look the same and he can not tell which is which. So he asks if he gives the six boxes uniformly at random to his six friends, one for each, what is the probability that exactly three of them gets his/her correct gift? You can use binomial coefficients in your