Suppose we consume a meal and get 850,000 J. How many Calories are ingested?

I am Not Sure About Your Question But,

Although every person's daily caloric intake is individual, based on their personal goals and needs, nutrition experts estimate that average daily consumption at each meal should be broken down as follows: 300 to 400 calories for breakfast, and 500 to 700 calories each for lunch and dinner.

it's c (engineer's do their work with mechanical stuff not on any living being)