#include <stdio.h>

#define s_LL signed long long


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

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

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

	if (point <= k * t) {
		printf("Yes\n");
	}
	else {
		printf("No\n");
	}
	return 0;
}