open System

let isIt x =
    let rec isIt' (x' : int) =
        if Math.Abs(x') < 10 then true
        elif x' % 10 <> 0 then false
        else isIt' (x' / 10)

    if x % 100 <> 0 then false
    else isIt' x

let solve a b =
    if isIt a && isIt b then
        Some(decimal a * decimal b / 10m)
    else
        let ab = decimal a * decimal b
        if Math.Abs(ab) > 99999999m then
            None
        else
            Some(ab)

let () =
    let a, b =
        Console.ReadLine()
        |> fun s -> s.Split()
        |> fun abArr -> int abArr.[0], int abArr.[1]
    
    let result =
        match solve a b with
        | Some(x) -> sprintf "%.0M" x
        | None -> "E"

    printfn "%s" result