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)

/**
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  */
object Main {
  def main(args: Array[String]): Unit = {
    val r = io.StdIn.readDouble()
    val s = math.Pi * math.pow(r, 2)
    val l = 2 * math.Pi * r
    println(f"$s%.6f $l%.6f")
  }
}