open System

let solve a b =
    if a % 100m = 0m && b % 100m = 0m then
        Some(a * b / 10m)
    else
        let ab = a * b
        if Math.Abs(ab) > 99999999m then
            None
        else
            Some(ab)


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

    printfn "%s" result