import math
radius=int(input("Enter a radius of a circle"))
num = math.pi*radius
num1 = num**2
print(num1)
      

2110dd5d1b7099b63bc493be0e05d0de7746d941
<mask token>

<mask token>
print(num1)

<mask token>
radius = int(input('Enter a radius of a circle'))
num = math.pi * radius
num1 = num ** 2
print(num1)

import math
radius = int(input('Enter a radius of a circle'))
num = math.pi * radius
num1 = num ** 2
print(num1)

import math
radius=int(input("Enter a radius of a circle"))
num = math.pi*radius
num1 = num**2
print(num1)
      
