input: Write a Python function to create a class Circle that calculates the area of a circle.
  assert Circle(5).calculateArea() == 78.53975
  assert Circle(10).calculateArea() == 314.159
  assert Circle(1).calculateArea() == 3.14159
output: import math
  
  class Circle:
      def __init__(self, radius):
          self.radius = radius
      
      def calculateArea(self):
          return round(math.pi * (self.radius ** 2), 5)