import java.util.*;
import java.io.*;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		PrintWriter ou = new PrintWriter(System.out);
		int h = Integer.parseInt(sc.next());
		int a = Integer.parseInt(sc.next());
		long z = Long.parseLong(sc.next());
		if(Math.abs(h) > a * z) ou.println("No");
		else ou.println("Yes");
		ou.flush();
		sc.close();
	}
}