Solution:
The factorial of 100 is a very big number. It's written as 100! and it means you multiply all the whole numbers from 1 to 100 together.
So, 100! = 1 x 2 x 3 x 4 x 5 x ... x 98 x 99 x 100.
Calculating it is a huge task, but it's an incredibly large number, with 24 zeros at the end
