import strutils

const x = 1000000007

let n = parseInt readLine stdin

# 等比の総和: ((初項*r^n)-初項)/(r-1)
# (10^n + (3 * 10^n - 3) / (10-1)) mod x
# (4 * 10^n - 1) / 3 mod x

proc p(v, m: int): int =
  if m == 0: 1
  elif m mod 2 == 0: p(v * v mod x, m div 2)
  else: v * p(v, pred m) mod x

var a = (4 * p(10, n) - 1 + x) mod x
while a mod 3 != 0: a.inc x

echo a div 3 mod x