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)

import java.util.Scanner

object Main extends App {
  val r = new Scanner(System.in).nextDouble
  println(f"${r*r*Math.PI}%.9f ${r*2*Math.PI}%.9f")
}