package cn.csj.oo3;

import java.util.Scanner;

public class test {
	public static void main (String[] args) {
		Scanner input = new Scanner(System.in);
		double a = input.nextInt();
		double b = input.nextInt();
	
		sum(a,b);
		subtraction(a,b);
		mul(a,b);
		division(a,b);
	}

	 private static void sum(double a, double b) {
		double resum=a+b;
		System.out.println(a+"+"+b+"="+resum);
	}
	
	private static void subtraction(double a,double b) {
		double resub=a-b;
		System.out.println(a+"-"+b+"="+resub);
	}
	
	private static void mul(double a,double b) {
		double remul=a*b;
		System.out.println(a+"*"+b+"="+remul);
	}
	
	private static void division(double a,double b) {
		double redivision=0;
		if(b!=0) {
			redivision=a/b;
		}
		else {
			redivision=0;   /*表示错误*/
		}
		System.out.println(a+"÷"+b+"="+redivision);
	}

}