simpleCalc

/**
 * Created by Anatoliy on 09.09.2016.
 * DevelopHomework 1
 * simpleCalc
 */

import java.util.Scanner;

public class Calc {
    public static void choseOp() {
        Scanner in = new Scanner(System.in);

        double a = in.nextInt();
        double b = in.nextInt();
        String sop = in.next();

        if (sop.equals("+")) {
            System.out.println(add(a, b));
        }

        if (sop.equals("-")) {
            System.out.println(substract(a, b));
        }

        if (sop.equals("*")) {
            System.out.println(multiply(a, b));
        }

        if (sop.equals("+")) {
            System.out.println(divide(a, b));
        }
    }

    static double add(double a, double b) {
        double res = a + b;
        return res;
    }

    static double substract(double a, double b) {
        double res = a - b;
        return res;
    }

    static double multiply(double a, double b) {
        double res = a * b;
        return res;
    }

    static double divide(double a, double b) {
        double res = a / b;
        return res;
    }

    public static void main(String[] args) {
        choseOp();
    }
}