#include <stdio.h>
#include <stdlib.h>

int main()
{
	int n,k,t;

	scanf("%d %d %d", &n, &k, &t);

	if(abs(n) <= k*t)
	{
		printf("Yes\n");
	}
	else
	{
		printf("No\n");
	}

	return 0;
}