Using the math Library
import math
radius = 4.0
area = math.pi * radius**2
print(f"Area: {area:.2f}")
print(f"Square root of 81: {math.sqrt(81)}")
Area: 50.27
Square root of 81: 9.0
import math
radius = 4.0
area = math.pi * radius**2
print(f"Area: {area:.2f}")
print(f"Square root of 81: {math.sqrt(81)}")
Area: 50.27
Square root of 81: 9.0