Well you have to take into consideration that whatever you consume that your body can't immediately utilize will either be excreted with your bowel movement or undergo biochemical conversions. Skipping some steps... it winds up being a free fatty acid from lipogenesis and subsequently undegoes triglyceride esterification and it's resting state is fat. If you aren't creating the phsysiological demand for that much energy then anything unused will partly contribute to glucogenesis and get fed into our Citric Acid Cycle and what's left will become fat like I mentioned earlier. It'll be put off into storage in our adipocytes until the potential threshold to initiate lipolysis begins.
You have to understand your body's homeostatic nature with energy regulation. It'll always opt for the most efficient source first which is either utilizing intramuscular energy storages (glycogen) and undergoing glycogenolysis or taking the excess glucose molecules available and converting them into viable energy via glycogenesis. A portion of glucose is also powering cellular respiration as a reactant for the pyruvate oxidation and eventual ADP>ATP from oxidative phosphorylation.
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