input: Write a python function to multiply two numbers without using the multiplication operator.
  assert Multiply(3, 4) == 12
  assert Multiply(5, 5) == 25
  assert Multiply(0, 10) == 0
  assert Multiply(7, 6) == 42
output: def Multiply(a, b):
      result = 0
      for _ in range(abs(b)):
          result += abs(a)
      
      if (a < 0 and b > 0) or (a > 0 and b < 0):
          result = -result
      
      return result