input: Write a python function to compute the area of a circle.
  assert compute_area_of_the_circle(3) == 28.274333882308138
  assert compute_area_of_the_circle(5) == 78.53981633974483
  assert compute_area_of_the_circle(0) == 0
output: def compute_area_of_the_circle(radius):
      import math
      return math.pi * radius ** 2