题目描述
Write a program which calculates the area and circumference of a circle for given radius r.
Constraints
- 0 < r < 10000
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.
Examples
Input
2
Output
12.566371 12.566371
Input
3
Output
28.274334 18.849556
输入格式
见题面
输出格式
见题面
样例输入
2
样例输出
12.566371 12.566371