#!/usr/bin/python3
def square_matrix_simple(matrix=[]):
    clone = []
    for i in matrix:
        clone.append([x*x for x in i])
    return clone


if __name__ == '__main__':
    matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

    new_matrix = square_matrix_simple(matrix)
    print(new_matrix)
    print(matrix)
