
    Create a function for an automated grading system that calculates the total distance around a square-shaped playground, where students input the length of one side in meters, to assess their understanding of perimeter calculations. The system should use this calculation to evaluate students' grasp of basic geometric measurements and provide appropriate feedback on their learning progress.
    

    
def square_perimeter(a):
    """
    Create a function for an automated grading system that calculates the total distance around a square-shaped playground, where students input the length of one side in meters, to assess their understanding of perimeter calculations. The system should use this calculation to evaluate students' grasp of basic geometric measurements and provide appropriate feedback on their learning progress.
    

    """
def square_perimeter(a):
    """
    Create a function for an automated grading system that calculates the total distance around a square-shaped playground, where students input the length of one side in meters, to assess their understanding of perimeter calculations. The system should use this calculation to evaluate students' grasp of basic geometric measurements and provide appropriate feedback on their learning progress.
    

    """
    perimeter = 4 * a
    return perimeter