You can wear terrible shirts and grow more fat, And eat three pounds of sausages at a go, Or only bread and pickle for a week, And hoard pens and pencils and beermats and things in boxes.
Each of these defensive missiles maybe only about 10 feet long but has some 24 pounds of high explosives and when they're close enough they detonate, obliterating everything in that part of the sky.
A good rule of thumb is 13 calories per pound of body weight for a sedentary person of either sex, 16 calories per pound for a moderately active person, and 18 calories per pound for a vigorously active person.