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 Ruby (judge verdict: Accepted)

def toi(a)
	b = []
	a.each do |n|
		b << n.to_i
	end
	b	
end
a=gets().to_f

s = a * a * Math::PI
l = 2 * a * Math::PI
print("#{s} #{l}\n")