import math

r = float(eval(input()))



a = math.pi * r**2

b = math.pi * r * 2



print((str(a) + " " + str(b)))
Input = float(eval(input()))

Area = Input**2*3.141592653589

Circumference = Input*2*3.141592653589

print(('{0:.6f} {1:.6f}'.format(Area,Circumference)))

import math

r = float(eval(input()))
a = math.pi * r**2
b = math.pi * r * 2
print((str(a) + " " + str(b)))

Input = float(eval(input()))
Area = Input**2 * 3.141592653589
Circumference = Input * 2 * 3.141592653589
print(("{0:.6f} {1:.6f}".format(Area, Circumference)))

-import math - -r = float(eval(input())) -a = math.pi * r**2 -b = math.pi * r * 2 -print((str(a) + " " + str(b))) +Input = float(eval(input())) +Area = Input**2 * 3.141592653589 +Circumference = Input * 2 * 3.141592653589 +print(("{0:.6f} {1:.6f}".format(Area, Circumference)))