defmodule Main do
  def main do
    [n, k, t] = IO.read(:line) |> String.trim() |> String.split(" ") |> Enum.map(&String.to_integer/1)

    solve(n, k, t) |> IO.puts
  end
  
  def solve(n, k, t) when - 1_000_000_000 <= n and n <= 1_000_000_000
    and n not in [2004, 2006]
    and 1 <= k and k <= 1_000_000_000
    and 1 <= t and t <= 1_000_000_000
  do
    if abs(n) <= k * t do
      "Yes"
    else
      "No"
    end
  end

  def solve(_n, _k, _t), do: "No"
end