Write a function that takes as input a tuple of numbers (t_1,...,t_{N+1}) and returns a tuple of length N where the i-th element of the tuple is equal to t_i * t_{i+1}.
def multiply_elements(test_tup):
  res = tuple(i * j for i, j in zip(test_tup, test_tup[1:]))
  return (res) 