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 PHP (judge verdict: Wrong Answer)

<?php

$num = explode(" ",trim(fgets(STDIN)));
$r = $num[0];
$area = $r * $r * 3.14;
$Circumference = 2 * $r * 3.14;
echo $area. " ". $Circumference .PHP_EOL;