<image>The following math problem contains an  placeholder. Please translate it into English:

As shown in image ①, there is a pattern on a tile. Using this type of tile to pave the floor, if you pave a 2×2 square pattern (as shown in image ②), there are a total of 5 complete circles. If you pave a 3×3 square pattern (as shown in image ③), there are a total of 13 complete circles. If you pave a 4×4 square pattern (as shown in image ④), there are a total of 25 complete circles. If you pave a 10×10 square pattern in this way, there will be a total of ___________ complete circles. ___