A normal person consumes 1,200 kilocalories a day, calories are the unit of heat, referred to as calories, in practice, can also be kilocalories or kilojoules as a unit. How many calories a normal person consumes a day is closely related to height, weight and physical activity. For example, if an adult weighs 60kg, the calorie consumption can be calculated as 30kcal/KG for light physical activity, 35/kg for medium physical activity, and 40/kg for heavy physical activity. The product of body weight and the number of calories corresponding to the corresponding physical activity is the number of calories consumed by a normal person in a day.