import java.util.*;
import java.io.*;
import java.math.*;

public class No722 {
    public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	int a = sc.nextInt(), b = sc.nextInt();
    	if(a % 10 == 0 && b % 10 == 0) {
    		BigDecimal aa = new BigDecimal(a), bb = new BigDecimal(b);
    		System.out.println(aa.multiply(bb));
    	}else {
    		long ll = a * b;
    		if(-99999999 <= ll && ll <= 99999999) {
    			System.out.println(ll);
    		}else {
    			System.out.println("E");
    		}
    	}
    }
}