import java.util.Arrays;
import java.util.LinkedList;
import java.util.Scanner;

public class Main {
	
	public static long gcd(long a, long b){
		return b == 0 ? a : gcd(b, a % b);
	}
	public static long lcm(long a, long b){
		return a / gcd(a, b) * b;
	}
	
	public static final long MOD = 1000000007;
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		final long N = sc.nextLong();
		final long M = sc.nextLong();
		
		long other_fact = 1;
		for(int i = 1; i <= (N - 2); i++){
			other_fact *= i;
			other_fact %= MOD;
		}
		
		long answer = 0;
		for(long fst = M; fst <= N; fst += M){
			for(long snd = fst + M; snd <= N; snd += M){
				answer += (other_fact * 2) % MOD;
				answer %= MOD;
			}
		}
		
		System.out.println(answer);
	}
}