import java.util.Scanner;
public class Calc {
    public static void main (String args[]) {
        for (;;) {
            System.out.println("Enter operation");
            Scanner keyboard = new Scanner(System.in);
            String operation = keyboard.nextLine();
            System.out.println("Enter first integer");
            int firstInt = keyboard.nextInt();
            System.out.println("Enter second integer");
            int secondInt = keyboard.nextInt();
            if (operation.equals("plus")) {
                System.out.println(firstInt + secondInt);
            } else if (operation.equals("minus")) {
                System.out.println(firstInt - secondInt);
            } else if (operation.equals("divide")) {
                System.out.println(firstInt / secondInt);
            } else if (operation.equals("multiply")) {
                System.out.println(firstInt * secondInt);
            }
        }

    }
}