input: Write a function to perform several simple math operations given two integers as inputs. The function should output the results of the following operations: addition, subtraction, multiplication, division, and modulo. If either of the inputs is zero, the function should print an error message and exit.
  assert calculate_operations(10, 5)
  assert calculate_operations(10, 2)
output: def calculate_operations(a, b):
      if a == 0 or b == 0:
          print("Error: Inputs cannot be zero.")
          return
      addition = a + b
      subtraction = a - b
      multiplication = a * b
      division = a / b
      modulo = a % b
      return addition, subtraction, multiplication, division, modulo