#include <stdio.h>

int main(int argc, char* argv[])
{
	int n = 0;
	int k = 0;
	int t = 0;

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

	int point = n;
	if (n < 0) {
		point *= -1;
	}

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

	return 0;
}