package Bo;
import java.util.Scanner;

public class Hello
{
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
       while(true){
            double x=scanner.nextDouble();
            char   z=scanner.next().charAt(0);
            double y=scanner.nextDouble();
            switch (z){
                case '+':
                    System.out.println(add(x,y));
                   break;
                case '-':1
                    System.out.println(delete(x,y));
                    break;
                case '*':
                    System.out.println(cheng(x,y));
                    break;
                case '/':
                    System.out.println(chu(x,y));
                    break;
            }
        }
    }
    public static double add(double a,double b){
        return a+b;
    }
    public static double delete(double a,double b){
        return a-b;
    }
    public static double cheng(double a,double b){
        return a*b;
    }
    public static double chu(double a,double b){
        return a/b;
    }

}