import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
mod = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

def inverse(N, mod):
	return (pow(N, mod - 2, mod))

def main():
	N, K, T = getlist()
	if abs(N) <= K * T:
		print("Yes")
	else:
		print("No")





if __name__ == '__main__':
	main()