
    Calculate the total perimeter distance of a delivery zone's boundary from a central distribution hub to help optimize fleet routing and resource allocation for a logistics company's last-mile delivery operations. The delivery zone is perfectly circular, with the distribution center at its center point.
    

    
def circle_circumference(r):
    """
    Calculate the total perimeter distance of a delivery zone's boundary from a central distribution hub to help optimize fleet routing and resource allocation for a logistics company's last-mile delivery operations. The delivery zone is perfectly circular, with the distribution center at its center point.
    

    """
def circle_circumference(r):
    """
    Calculate the total perimeter distance of a delivery zone's boundary from a central distribution hub to help optimize fleet routing and resource allocation for a logistics company's last-mile delivery operations. The delivery zone is perfectly circular, with the distribution center at its center point.
    

    """
    perimeter = 2 * 3.1415 * r
    return perimeter