#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <cmath>
#include <queue>
#include <functional>
#include <map>
using namespace std;

long long n, m, mod = 1000000007; bool primes[1000009];

long long prime(long long p) {
	if (p == 0) return 0;
	long long R = p*p;
	for (int i = 2; i <= p; i++) {
		if (primes[i] == true) {
			long long G = p / i;
			R -= 1LL * G*G;
		}
	}
	return R - 1;
}

int main() {
	for (int i = 2; i <= 1000008; i++) primes[i] = true;
	for (int i = 2; i*i <= 1000008; i++) {
		for (int j = i*i; j <= 1000008; j += i) primes[j] = false;
	}
	cin >> n >> m;
	long long G = prime(n / m);
	long long ret = 1;
	for (int i = 1; i <= n - 2; i++) { ret *= i; ret %= mod; }
	ret *= (G % mod); ret %= mod;
	cout << ret << endl;
	return 0;
}