Roberto has four pairs of trousers, seven shirts, and three jackets. How many different outfits can he put together if an outfit consists of a pair of trousers, a shirt, and a jacket?
To find the total number of outfits, I need to multiply the number of choices for each item of clothing. For trousers, I have four choices. For shirts, I have seven choices. For jackets, I have three choices. So the total number of outfits is 4 x 7 x 3 = 84.

