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 scala.io.StdIn.readDouble
import scala.math.Pi

object Main {

  def main(args: Array[String]) = {
      val r = readDouble()
      println("%.6f".format(r*r*Pi) + " " + "%.6f".format(2*r*Pi))
  }
}