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]): Unit ={
        var in = scala.io.StdIn.readDouble()
        var a = in * in * scala.math.Pi
        var c = (in + in) * scala.math.Pi
        println(f"$a%.7f"  + " " + f"$c%.7f")
    }
}