Problem:
Circle

Write a program which calculates the area and circumference of a circle for given radius r.

Input

A real number r is given.

Output

Print the area and circumference of the circle in a line. Put a single space between them. The output should not contain an absolute error greater than 10-5.

Constraints

0 < r < 10000

Sample Input 1

2

Sample Output 1

12.566371 12.566371

Sample Input 2

3

Sample Output 2

28.274334 18.849556

Solution in Scala (judge verdict: Accepted)

object Main extends App {
	override def main(args: Array[String]) = {
		val sc = new java.util.Scanner(System.in)
		
		val r = sc.nextDouble()	

		println(f"${r*r*Math.PI}%f ${2*r*Math.PI}%f")
	}
	
}