Okay 1st of all you can't add area.
But, heres how you can FIND area:
1st you multiply the labels
Then...Well that's it
Heres an example for you my little friend:
the answer would be:8 sqare units,because I multiplied 4x2 which is 8
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Add them together!
Add together the areas of all 6 sides.
Break up the odd shape into even shapes and add the areas.
To calculate the surface area of a shape find the area of each side, and then, add all of the areas together. The sum of the areas is the surface area.
Partition it into simple shapes and work out their areas. Then add together all the components.