<a target=_blank href="http://acm.hdu.edu.cn/showproblem.php?pid=1002">點選開啟連結</a>

import java.util.*;
import java.math.BigDecimal;
public class p1002{
	public static void main(String args[]){
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		int k=1;
		while(N-->0){
			BigDecimal a=sc.nextBigDecimal();
			BigDecimal b=sc.nextBigDecimal();
			System.out.println("Case "+(k++)+":");
			System.out.println(a+" + "+b+" = "+a.add(b));
		    if(N>0){
		    	System.out.println();
		    }							
		}
	}
}