A human diet weighing 70 kg contains 400 g of protein (sat = 20.1 MJ / kg), 22 g of fat (squ = 39.8 MJ / kg) and 80 g of carbohydrates (16.7 MJ / kg). Every day he rises to a height of 3 km and does the work before it, including the work of metabolism, 4 times the mechanical work of raising his body to a height of 3 km. What is the change in internal energy in such a daily process?
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