let solve n k t =
    if (abs_float n) /. k <= t then
        "Yes"
    else
        "No"

let () =
    let n, k, t =
        read_line ()
        |> fun l -> Scanf.sscanf l "%f %f %f" (fun n k t -> (n, k, t))
    in
    print_endline @@ solve n k t