from concurrent.futures import ProcessPoolExecutor

def square(n: int) -> int:
    return n * n

def cpu_task_with_executor(numbers: list[int]) -> list[int]:
    # Usa ProcessPoolExecutor para calcular el cuadrado de cada número
    # y retorna la lista de resultados.
    with ProcessPoolExecutor(max_workers=4) as executor:
        results = list(executor.map(square, numbers))
    return results