Write a definition of area that includes all the information
that you think is important.

In geometry, the area can be defined as the space occupied by a flat shape or the surface of an object. The area of a figure is the number of unit squares that cover the surface of a closed figure. Area is measured in square units such as square centimteres, square feet, square inches, etc.

so, converting firstly the mixed fractions to improper fractions and then "adding".