import java.util.*;

public class Main {

  public static long MOD = (long)Math.pow(10, 6) + 7;

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    long inv = func(4, MOD - 2);
    long t = 1;
    n = n % MOD;
    if(n % 2 == 0) {
      t = (n * n) % MOD;
      t = (t * inv) % MOD;
      t = (t + n) % MOD;
    } else {
      t = (n * n + MOD - 1) % MOD;
      t = (t * inv) % MOD;
      t = (t + n) % MOD;      
    }
    System.out.println(t);
  }

  public static long func(long a, long x) {
    if(x == 0) return 1;
    if(x % 2 == 0) {
      long t = func(a, x / 2);
      return (t * t) % MOD;
    } else {
      long t = func(a, x / 2);
      t = (t * t) % MOD;
      return (a * t) % MOD;
    }
  }
}