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 Kotlin (judge verdict: Accepted)

fun main(args: Array<String>) {
    val r = readLine()?.toDouble() ?: return
    println(String.format("%1$.6f %2$.6f", calcArea(r), calcCircumference(r)))
}

fun calcArea(r: Double) : Double {
    return r * r * Math.PI
}

fun calcCircumference(r: Double) : Double {
    return 2 * r * Math.PI
}