#include <stdio.h>
#include <math.h>

int main(void) {
	long int n, k, t;
	scanf("%ld%ld%ld", &n, &k, &t);
	if(abs(n) <= k * t){
		printf("Yes");
	}
	else{
		printf("No");
	}
	
	printf("\n");
	
	return 0;
}