圆的面积

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Problem Description

Give you the radius of a circle，caculate its area，PI=3.141592653。

Input

The first line of the input is a positive integer N,then follows N lines,each line is a real number represent the radius of the circle.

Output

Output contains N lines,for each line of the input you should output one line, Case K: S,and K(count from 1)represents the number of the circle and S is the area.Keep two digits after the decimal point.

Example Input

Example Output

Case 1: 3.14Case 2: 12.57Case 3: 28.27

Hint

import java.util.Scanner;public class Main {public static void main(String[] args) {// TODO Auto-generated method stubScanner in = new Scanner(System.in);while(in.hasNext()){int n = in.nextInt();for(int i = 1; i <= n; i++){int a = in.nextInt();Circle circle = new Circle(a);double s = circle.area();System.out.printf("Case %d: %.2f\n",i,s);}}} }class Circle{int a;public Circle(int a){this.a = a;}public double area(){return a*a*Math.PI;}}

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