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 JavaScript (judge verdict: Accepted)

'use strict';
(function(stdin) {
  var lines  = stdin.toString().split('\n');
  var result = (function(r) {
  	return [
  		Number(Math.PI * Math.pow(r,2)).toFixed(6)
  		,Number(Math.PI * 2 * r).toFixed(6)
  	].join(' ');
  }(parseFloat(lines[0])
  ));
  console.log(result);
}(require('fs').readFileSync('/dev/stdin', 'utf8')));