I totally agree that the numbers are off, but your calculation is incorrect as well, because most obese people burn much more than 2000 calories a day. Someone

I totally agree that the numbers are off, but your calculation is incorrect as well, because most obese people burn much more than 2000 calories a day. Someone who is about 240 pounds could eat about 3000 calories a day simply to stay at that weight, even more if they exercise a lot. Of course this is not really this simple, people vary, hormones, metabolism etc. all affect weight loss/gain, but the general principle stands.