Use a more concise calculation for dest dims

    def upscale(self, img: PIL.Image, scale, selected_model: str = None):

        self.scale = scale

        dest_w = round((img.width * scale - 4) / 8) * 8 if img.width * scale % 8 != 0 else img.width * scale

        dest_h = round((img.height * scale - 4) / 8) * 8 if img.height * scale % 8 != 0 else img.height * scale

        dest_w = int((img.width * scale) // 8 * 8)

        dest_h = int((img.height * scale) // 8 * 8)

        for _ in range(3):

            shape = (img.width, img.height)