N = gets.to_i
MOD = 10 ** 9 + 7

n = 3
base = 3

(1..N).each do |i|
  if i == N
    base = (base * 10 / 3) % MOD
  else
    base = (base * 10) % MOD
  end

  n = (n + base) % MOD
end

puts(n % MOD)