import java.io.*;

class Arithmetic {
	public static void main ( String [ ] args ) throws Exception {
		InputStreamReader isr = new InputStreamReader ( System.in ) ;
		BufferedReader comingIn = new BufferedReader ( isr ) ;
		PrintWriter goingOut = new PrintWriter ( System.out , true ) ;
		
		char op ; // space to hold a character rep some arithmetic operator
		int x , y ; // space to store input
		double answer = 0 ; // space for answer, poss decimal because of div
		String ask = "Please enter an " ; // more generic this time
		
		goingOut.println ( ask + "integer." ) ;
		x = Integer.parseInt ( comingIn.readLine( ) ) ;
		goingOut.println ( ask + "operator.") ;
		op = ( comingIn.readLine( ) ).charAt(0) ;
		goingOut.println ( ask + "integer.") ;
		y = Integer.parseInt ( comingIn.readLine( ) ) ;
		
		switch ( op ) {
		case '+' :  answer = x + y ;  break ;
		case '-' :  answer = x - y  ;  break ;
		case '*' :  answer = x * y  ;  break ;
		case '/' :  answer = y!=0 ? (double)x/y : Double.NaN; break;
		default : goingOut.println( "Sorry, I didn’t understand what you meant ... bye-bye!" ) ; 
		          answer = Double.NaN ;
		} // end switch statement interpreting the arithmetic operation to be performed
		
		goingOut.println ( "The value of " +x+ " " +op+ " " +y+ " is " +answer) ;
		goingOut.println ( "Thanks for using \"Multiplier\".  Do come again!" ) ;
		comingIn.close( ) ;
		isr.close();
	} // end of main method
} // end of class Arithmetic