output_description: Print the area and perimeter of the rectangle in a line. The two integers
  should be separated by a single space.
input_description: The length a and breadth b of the rectangle are given in a line separated by a
  single space.
attempt: a, b = [
      int(i)
      for i in input(
          "Enter two numbers concatenated by a single space, e.g. '3 5': "
      ).split()
  ]
  print(str(a * b) + " " + str((a + b) * 2))
  
problem_description: Rectangle
  
  Write a program which calculates the area and perimeter of a given rectangle.
samples: [{"input": "3 5", "output": "15 16"}]