num = [int(x) for x in str(input()).split(" ")]

Howlong = abs(num[0])
Speed = num[1]
OutTime = num[2]

count = 0
now = 0

while Howlong > now:
    count += 1
    now += Speed

if count <= num[2]:
    print("Yes")
elif not count <= num[2]:
    print("No")