The average adult needs about 2000 calories per day. There are a little less than 4 dietary calories (kcal) in a gram of sucrose (table sugar). One mole of sucrose weights 342.3 grams. A mole of anything is 6.02 x 10^23 molecules. Dietary fats (usually 18-20 carbons) contain about 9 dietary calories per gram.

Assuming all the food that people eat goes to making ATP, approximately how many ATP molecules does the average person make and use each day?