task1.py

# Get radius from user
radius = int(input("Enter the radius:"))
PIE_VALUE = 3.1415926535
# calculate area
def calculate_area(PIE_VALUE, radius):
 if radius>= 1:
 area = PIE_VALUE * radius**2
 area = round(area)
 return area
 
 
print(calculate_area(PIE_VALUE, radius))