You want to know the area of a sheet of paper. What would you measure? How would you calculate the area?
You would measure the side and bottom of the paper ( the length and width) and multiply them together. Remember that your answer will be units( such as inches or centimeters) to the second power( with a little two above the inches or centimeters)
you just need to know the height and the width of the paper then multiply the height with the width and it will give you the area of the paper