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)

process.stdin.resume();
process.stdin.setEncoding('utf8');
process.stdin.on('data', function (chunk) {
    var input = chunk.split(" ");
    var output = "";
    var num = new Array();
    
    for(var i = 0; i < input.length; i++){
        num[i] = Number(input[i]);
    }
    
    s = num[0] * num[0] * Math.PI;
    l = num[0] * 2 * Math.PI;
    
    console.log(s.toFixed(6) + " " + l.toFixed(6));
});