Similarly, if f (2) = f (3-1) = f (3)/f (1), it can be concluded that f(3)=8.
You can get F(5)=32 by analogy.
And f (0) = f (1-1) = f (1)/f (1) =1.
And the original formula = f (5) f (4) f (3) ... f (0) ... f (-3) f (-4).
=f(5)f(4-0)f(3-0)f(2-0)...f(0)...f(0-2)f(0-3)f(0-4)
= f(5)f(4)f(3)f(2)f( 1)f(0)f(0)f(0)f(0)f(0)f(0)f(0)f( 1)f(2)f(3)f(4)= f(5)f(0)= 32 * 1 = 32
So the result is 32.