
    Design a function to calculate the total surveillance coverage area needed for monitoring transaction patterns across the four vertical faces of a secure processing unit, given the unit's dimensional width. The lateral monitoring surfaces exclude the top and bottom faces of the processing unit, focusing only on the four sides where real-time transaction pattern detection occurs.
    

    
def lateralsurface_cube(l):
    """
    Design a function to calculate the total surveillance coverage area needed for monitoring transaction patterns across the four vertical faces of a secure processing unit, given the unit's dimensional width. The lateral monitoring surfaces exclude the top and bottom faces of the processing unit, focusing only on the four sides where real-time transaction pattern detection occurs.
    

    """
def lateralsurface_cube(l):
    """
    Design a function to calculate the total surveillance coverage area needed for monitoring transaction patterns across the four vertical faces of a secure processing unit, given the unit's dimensional width. The lateral monitoring surfaces exclude the top and bottom faces of the processing unit, focusing only on the four sides where real-time transaction pattern detection occurs.
    

    """
    LSA = 4 * (l * l)
    return LSA