import java.util.*; import java.io.*; import java.math.*; public class No722 { public static void main(String[] args) { Scanner sc = new Scanner(System.in); BigDecimal a = new BigDecimal(sc.nextInt()), b = new BigDecimal(sc.nextInt()); BigDecimal j = new BigDecimal(10), z = new BigDecimal(0), m = new BigDecimal(-1), h = new BigDecimal(100); if(a.abs().toString().replaceAll("0", "").length() == 1 && b.abs().toString().replaceAll("0", "").length() == 1 && a.remainder(j).equals(z) && b.remainder(j).equals(z) && a.toString().length() > 2 && b.toString().length() > 2) { System.out.println(a.multiply(b).divide(j)); }else { BigDecimal min = new BigDecimal(-99999999), max = new BigDecimal(99999999); if(a.multiply(b).compareTo(min) >= 0 && a.multiply(b).compareTo(max) <= 0) { System.out.println(a.multiply(b)); }else { System.out.println("E"); } } } }