#Complete the program to output 'Surface area is ' followed by the value of cube_area to five digits after the decimal point 

# Ex: if the input is 1.4000, then the output is: 

# Surface area is 11.76000 

# Note print (f' {my_float:.xf}') outputs my_float to X digits after the decimal point 

cube_edge = float(input())
cube_area = 6.0 * (cube_edge * cube_edge)

print(f'Surface area is { cube_area:.5f}')