the radius of a sphere is increased by 50 % . the increase in surface area of the sphere is :
import math
n0 = 50.0
t0 = n0 / 100.0
t1 = 4 * math.pi * 1.0**2
t2 = t0 + 1.0
t3 = 4 * math.pi * t2**2
t4 = t3 - t1
t5 = t4 / t1
answer = t5 * 100.0
print(answer)