#include<stdio.h>
int main()
{
	long long int n, k, t;
	scanf("%lld %lld %lld", &n, &k, &t);
	if (n < 0)
		n *= -1;
	if (n > k * t)
		printf("No\n");
	else
		printf("Yes\n");
	return 0;
}