It is known that the area of a regular dodecagon inscribed in a circle of radius a is 3a^2.
Given an integer r, find the area of a regular dodecagon inscribed in a circle of radius r.

-----Constraints-----
 - 1 \leq r \leq 100
 - r is an integer.

-----Input-----
Input is given from Standard Input in the following format:
r

-----Output-----
Print an integer representing the area of the regular dodecagon.

-----Sample Input-----
4

-----Sample Output-----
48

The area of the regular dodecagon is 3 \times 4^2 = 48.

Difficulty: introductory

Starter code:

Solutions:
r=int(input())
print(3*r**2)

r=int(input())
a=r
print(3*a**2)

print(3*int(input())**2)

r = int(input())
print(3*r**2)

print(3*pow(int(input()),2))

r=int(input())

print(3*r**2)

r = int(input())
print(3*(r**2))

print(3*(int(input())**2))

r = int(input())
print(r**2*3)

print((3*int(input())**2))


print(3*int(input())**2)

n = int(input())
print(3 * n ** 2)

r = int(input())
print(3 * r * r)

print(3*int(input())**2)

x = int(input())
print(3*x**2)

r=int(input())

print(3*(r**2))

print(3 * int(input()) ** 2)

r = int(input())
print(3*r*r)

r = int(input())
print(r ** 2 * 3)

n=int(input())
print(3*n**2)

#ABC134 A

r = int(input())
print(3*r*r)

r=int(input())
print(3*r*r)

print(3*int(input())**2)

r = int(input())

print(3 * r**2)

r = int(input())

print(3 * r ** 2)

r = int(input())
print((3 * r ** 2))


print(3*int(input())**2)

r = int(input())
print(3 * r * r)

print(3*int(input())**2)

print(3*int(input())**2)

r = int(input())
ans = 3*r*r
print(ans)

r = int(input())
print(3*(r**2))

r = int(input())

print(3 * r**2)

r = int(input())
print(3 * r ** 2)

r = int(input())
print(3*r*r)

r = int(input())
print(3*(r**2))

def resolve():
    r = int(input())
    print(3*r**2)
resolve()

print(3*int(input())**2)

n = int(input())
print(3*n**2)

r = int(input())
print(3*r*r)

r  = int(input())
print(3*r*r)

print(3 * int(input()) ** 2)

r=int(input())
print(r**2*3)

print(3*int(input())**2)

n = int(input())
print(3*(n**2))

print((3 * int(input()) ** 2))



print(3*int(input())**2)

r = int(input())
print(3 * r * r)

r = int(input())
print(3 * r * r)

r = int(input())
print(3*r*r)

print((3*int(input())**2))


print(3*int(input())**2)

a = int(input())
print(a ** 2 * 3)

r = int(input())
print((3 * (r ** 2)))


r=int(input())
print(3*r**2)

print(( int(input()) ** 2 * 3 ))


r = int(input())
print(3 * r * r)

x  = int(input())
print(x*x*3)

r = int(input())
print(3 * r**2)

r = int(input())
print(3*(r**2))

r = int(input())
print(3*r*r)

print(3*int(input())**2)

print(3*(int(input()))**2)

r = int(input())
print(3*r**2)

r = int(input())
print(3*r*r)

print(3 * int(input()) ** 2)

r = int(input())
print(int(3 * r * r))

radius = int(input())
area = lambda r: 3*(r**2)
print((area(radius)))


print(3*int(input())**2)

r=int(input())
print(3*(r**2))

a=int(input())
print(3*(a**2))

r = int(input())
print((3 * r * r))


r = int(input())
print(3*(r**2))

print(3 * int(input()) ** 2)

r = int(input())

print(r * r * 3)

print(3 * (int(input()) ** 2))

r = int(input())

print(3*r**2)

print(3*int(input())**2)

r = int(input())
print(3 * r ** 2)

R=int(input())
print((3*R*R))



r = int(input())
print(3 *r*r)

a = int(input())
print(3*(a**2))

r = int(input())
print((3*r**2))


r=int(input())
print(3*r**2)

r=int(input())

ans=3*r**2
print(ans)


r = int(input())
print(3 * r ** 2)

n = int(input())
print(3*(n**2))

r = int(input())
print(3*r*r)

N = int(input())

print(3*(N**2))

r = int(input())
print(3*r**2)

r = int(input())
print(3*r*r)

n=int(input())
print(3*n**2)

r=int(input())
print(3*r**2)

a = input()
r = int(a)

z = 3*r*r
print(z)


r = int(input())
print(r**2 * 3)

r = int(input())
print(3*r*r)

print((3*int(input())**2))



r=int(input())

print(3*r**2)

print(3*int(input())**2)