
    Design a function that calculates the total security coverage area of a bank transaction's verification protocol, where the protocol is visualized as a regular polygon with 's' verification steps arranged symmetrically, each step having a standardized security length 'l'. The resulting area represents the comprehensive protection level provided by the multi-step authentication system, helping users understand the security strength of their high-value transactions.
    

    
from math import tan, pi

def area_polygon(s, l):
    """
    Design a function that calculates the total security coverage area of a bank transaction's verification protocol, where the protocol is visualized as a regular polygon with 's' verification steps arranged symmetrically, each step having a standardized security length 'l'. The resulting area represents the comprehensive protection level provided by the multi-step authentication system, helping users understand the security strength of their high-value transactions.
    

    """
from math import tan, pi

def area_polygon(s, l):
    """
    Design a function that calculates the total security coverage area of a bank transaction's verification protocol, where the protocol is visualized as a regular polygon with 's' verification steps arranged symmetrically, each step having a standardized security length 'l'. The resulting area represents the comprehensive protection level provided by the multi-step authentication system, helping users understand the security strength of their high-value transactions.
    

    """
    area = s * l ** 2 / (4 * tan(pi / s))
    return area