import java.io.*;                

class Calculator
{
     public static void main ( String [] args ) throws IOException    
     {
          BufferedReader stdin =  new BufferedReader(new InputStreamReader( System.in ));

            System.out.print( " Enter Number 1:  " );
            String input   =   stdin.readLine();            
            int a    =   Integer.parseInt( input );

            System.out.print( "Enter Number 2:  " );
            input   =   stdin.readLine();                    
            int b    =   Integer.parseInt( input );

            System.out.print( "Enter your choice: \n1.Addition\n2.Subtraction\n3.Multiplication\n4.Division\nYour Choice: ");

            
            input        =  stdin.readLine();        
            int choice  =  Integer.parseInt( input );

            switch( choice )                        
        {
        case 1:                              
        System.out.println( a +" + "+ b + " = " + (a+b) );
        break;
        
        case 2:                              
        System.out.println( a + " - " + b +" = " + (a-b) );
        break;

        case 3:                                
        System.out.println( a + " * " + b +" = " + (a*b) );
        break;

        case 4:                                
        System.out.println( a + " / " + b +" = " + (float)(a/b) );    
                 break;
                
                
                

        default:                                
        System.out.println( "Enter a valid choice..." );

            }
      }                                                    
}