
    Write a function that calculates the total border length of a square-shaped geographical monitoring zone for suspicious credit card transactions, where the monitoring zone's side length is defined by a radius in kilometers. This perimeter calculation helps security systems establish the boundary length needed for continuous fraud detection monitoring along the zone's edges.
    

    
def square_perimeter(a):
    """
    Write a function that calculates the total border length of a square-shaped geographical monitoring zone for suspicious credit card transactions, where the monitoring zone's side length is defined by a radius in kilometers. This perimeter calculation helps security systems establish the boundary length needed for continuous fraud detection monitoring along the zone's edges.
    

    """
def square_perimeter(a):
    """
    Write a function that calculates the total border length of a square-shaped geographical monitoring zone for suspicious credit card transactions, where the monitoring zone's side length is defined by a radius in kilometers. This perimeter calculation helps security systems establish the boundary length needed for continuous fraud detection monitoring along the zone's edges.
    

    """
    perimeter = 4 * a
    return perimeter