#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;

#define MOD (int)(1e9+7)

int solve(int N,int M) {
	long long cnt = N / M;

	long long ans = cnt*(cnt - 1);
	ans %= MOD;
	for (int i = N - 2; i >= 1; i--) {
		ans *= i;
		ans %= MOD;
	}
	return ans;
}

int main()
{
	int N, M; cin >> N >> M;

	cout << solve(N, M) << endl;

    return 0;
}