How many calories???

Hello I was just wondering how many calories everyone was staying around? I had surgery 4 months ago and of course the weight loss is slowing down. I have eating around 600-700 calories a day. I make sure I get enough protein from my shakes. I have also started walking again, since it has been nice out lately. I would like to walk at least 4 times a week. Let me know how you are doing and what you are doing to help out with your weight loss. Melissa