Problem:
Rectangle

Write a program which calculates the area and perimeter of a given rectangle.

Input

The length a and breadth b of the rectangle are given in a line separated by a single space.

Output

Print the area and perimeter of the rectangle in a line. The two integers should be separated by a single space.

Constraints

1 ≤ a, b ≤ 100

Sample Input 1

3 5

Sample Output 1

15 16

Solution in Ruby (judge verdict: Accepted)

class Rectangle
    attr_accessor :x,:y
    def initialize(x,y)
        self.x = x
        self.y = y
    end
    def calculate_area
        return self.x*self.y
    end
    def calculate_parameter
        return 2*self.x+2*self.y
    end
end

nums = gets.split.map(&:to_i)
rec = Rectangle.new(*nums)
puts("#{rec.calculate_area} #{rec.calculate_parameter}")