input: Write a python function to calculate the product of all elements except the first element in each sub-array.
  assert get_products([[1, 2, 3], [4, 5, 6], [7, 8, 9]]) == [6, 30, 72]
  assert get_products([[3, 3, 3], [2, 2, 2], [1, 1, 1]]) == [9, 4, 1]
  assert get_products([[5, 6, 7], [8, 9, 10], [11, 12, 13]]) == [42, 90, 156]
output: def get_products(arr):
      result = []
      for sub_arr in arr:
          product = 1
          for num in sub_arr[1:]:
              product *= num
          result.append(product)
      return result