please why doesn't it execute properly

Question

def multiply(a, b):
a * b

Answer 1

Gyan Adu it would help to see the rest of the code.... this is incomplete by itself.

Answer 2

def multiply(a,b)
return (a*b)

print(multiply(2,3)) =>6

Answer 3

Maybe because you don't have a return statement, like
return a*b
otherwise, you are not storing the result of the multiplication anywhere