In [4]:
def find_radius(length):
return length / 3.14159
In [5]:
def find_max_area(radius):
return (3.14159*pow(radius, 2))/2
In [6]:
while True:
length = int(raw_input())
if length == 0:
break
radius = find_radius(length)
print '%.2f' % find_max_area(radius)
In [ ]: