the area of a circular field is 17.56 hectares . find the cost of fencing it at the rate of rs . 4 per metre approximately
import math
n0 = 17.56
n1 = 4.0
t0 = n0 / 3.141592653589793
t1 = math.sqrt(max(0, t0))
t2 = t1 * 100.0
t3 = 2 * math.pi * t2
answer = t3 * n1
print(answer)