def CHECKOK(x: int) -> bool:
    if x == 0:
        return False
    return 2 <= len(str(abs(x))[1:]) == str(abs(x))[1:].count("0")
A, B = map(int, input().split())
if CHECKOK(A) and CHECKOK(B):
  print(A * B // 10)
elif abs(A * B) < 100000000:
  print(A * B)
else:
  print("E")