import java.util.Scanner;

public class HelloWorld {

	    public static void main(String[] args) throws Exception {

	    	Scanner sc = new Scanner(System.in);
	    	long n = sc.nextLong();
	    	long k = sc.nextLong();
	    	long t = sc.nextLong();
	    	if (n < 0) {n = -n;}

	    	System.out.println(k * t >= n ? "Yes":"No");
	    	}

}