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

import java.math.BigInteger;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.*;public class Main {public static void main(String[] args) throws ParseException {// TODO Auto-generated method stubScanner cin = new Scanner(System.in);int  n=cin.nextInt();for(int i=1;i<=n;i++){int c=cin.nextInt();double d=vital(c);System.out.print("Case "+i+": ");System.out.printf("%.2f\n",d);}}public static double vital(int n){double pi=3.141592653;return pi*n*n;}}

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