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)

import java.util.Scanner

fun main(args:Array<String>){
    val cin = Scanner(System.`in`)
    val r = cin.nextDouble()
    val pi = 3.141592653589
    
    val area = r*r*pi
    val cir = 2*r*pi

    println("%f %f".format(area,cir))
}