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 C# (judge verdict: Accepted)

using System;
using System.Linq;

namespace ITP1_1_C_Rectangle
{
    class Program
    {
        static void Main(string[] args)
        {
            var input = Console.ReadLine().Split( ' ' ).Select( int.Parse );
            Console.WriteLine( input.Aggregate( (acc, n) => acc * n ) + " " + input.Sum( n => n * 2 ) );
        }
    }
}