using System;
using System.IO;
using System.Linq;
using System.Collections.Generic;
using System.Text;

public class Program
{

    public void Proc()
    {
        long[] inpt = Reader.ReadLine().Split(' ').Select(a => long.Parse(a)).ToArray();

        if(IsAnsan(inpt)) {
            long ans = inpt[0] * inpt[1] / 10;
            Console.WriteLine(ans);
        } else {
            long ans = inpt[0] * inpt[1];
            if(Math.Abs(ans)> 99999999) {
                Console.WriteLine("E");
            } else {
                Console.WriteLine(ans);
            }
        }


    }

    private bool IsAnsan(long[] inpt) {
        foreach(int item in inpt) {
            if(item == 0) {
                return false;
            }
            string nokori;
            if(item < 0) {
                nokori = item.ToString().Substring(2);
            } else {
                nokori = item.ToString().Substring(1);
            }
            if(nokori.Length < 2) {
                return false;
            }
            if(nokori.Any(a=>a!='0')) {
                return false;
            }
        }
        return true;
    }


    private int[] GetIntArray() {
        return Reader.ReadLine().Trim().Split(' ').Select(a => int.Parse(a)).ToArray();
    }


    public class Reader
    {
        static StringReader sr;
        public static bool IsDebug = false;
        public static string ReadLine()
        {
            if (IsDebug)
            {
                if (sr == null)
                {
                    sr = new StringReader(InputText.Trim());
                }
                return sr.ReadLine();
            }
            else
            {
                return Console.ReadLine();
            }
        }
        private static string InputText = @"



30000000 -70000000








";
    }

    public static void Main(string[] args)
    {
#if DEBUG
        Reader.IsDebug = true;
#endif
        Program prg = new Program();
        prg.Proc();
    }
}