
    Write a function to calculate the total surface area of a standard safety deposit box given its length, which is needed to determine appropriate insurance coverage and storage fees for the bank's vault system. The safety deposit boxes are perfect cubes, with all sides being equal in length.
    

    
def surfacearea_cube(l):
    """
    Write a function to calculate the total surface area of a standard safety deposit box given its length, which is needed to determine appropriate insurance coverage and storage fees for the bank's vault system. The safety deposit boxes are perfect cubes, with all sides being equal in length.
    

    """
def surfacearea_cube(l):
    """
    Write a function to calculate the total surface area of a standard safety deposit box given its length, which is needed to determine appropriate insurance coverage and storage fees for the bank's vault system. The safety deposit boxes are perfect cubes, with all sides being equal in length.
    

    """
    surfacearea = 6 * l * l
    return surfacearea