A warehouse store sells cartons of gum. Each carton contains 5 packs of gum, and there are 3 sticks of gum in each pack. Each brown box contains 4 cartons of gum. How many sticks of gum are there in 8 brown boxes? Let's think first. Chain of thought:
5 packs of gum contain 5 * 3 = 15 sticks of gum. If each brown box contains 4 cartons, 8 brown boxes contain 8 * 4 = 32 cartons. So, 8 brown boxes contain 32 * 15 = 480 sticks of gum.
Therefore, the answer is 480.