A,B=map(int,input().split())

def check(x,y):
  a=x
  b=y
  n,m=0,0
  while a>0:
    if a%10==0:
      a/=10
      n+=1
    elif a%10!=0 and (n<2 or a>10):
      return [0,0,0,0]
    else:
      break
  while b>0:
    if b%10==0:
      b/=10
      m+=1
    elif b%10!=0 and (m<2 or b>10):
      return [0,0,0,0]
    else:
      break
  return [a,b,n,m]

ans=check(A,B)
if ans[0]==0:
  if -99999999 <= A*B <= 99999999:
    print(int(A*B))
  else:
    print("E")
else:
  print(int(ans[0]*ans[1]*(10**(ans[2]+ans[3]-1))))