input: Write a python function to handle division by zero errors.
  assert handle_division(5, 0) == "division by zero"
  assert handle_division(10, 2) == 5.0
  assert handle_division(8, 4) == 2.0
output: def handle_division(a, b):
      try:
          return a / b
      except ZeroDivisionError:
          return "division by zero"