Answer:
[tex]\boxed{ 2880}[/tex]
Step-by-step explanation:
The factorial of a positive integer n is the product of n and all the integers between 1 and n.
4! = 4 × 3 × 2 × 1 = 24
5! = 5 × 4 × 3 × 2 × 1 = 120
So,
5! 4! = 120 × 24 = [tex]\boxed{ 2880}[/tex]