Something is off with that calculation. Carbs and protein = 4kcal per gramm, fat is 9kcal per gramm.
0.2*9 + 7*4 + 3*4 = 41.8kcal
Not going to make you fat but not too shabby either, especially the protein content. Seems you run into protein toxicity issues pretty fast around 1000kcal, but if you enter ketosis it might be a good way to protein so your muscles don't waste.