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 {
  
  def main(args: Array[String]) {
     val r = readLine().toDouble
     
     val area = Math.PI * r * r
     val circumference = 2 * Math.PI * r
     println(f"$area%.5f $circumference%.5f")
  }
}