A page of your notebook is fully covered by 6 pictures. Calculate the area of the page if each picture measures 8 by 6 cm.

We are told the dimensions of each picture (8 by 6 cm), so we can calculate the area of one picture. The area of a rectangle is simply the length times the width, so in this case 

The units in this case are square centimeters (cm^2).

Now, to calculate the area of the entire page, we need only multiply the area of one picture by six, since we are told six images cover the notebook page entirely. 

 cm^2.

It is interesting to note that while we know the area of the page, we cannot know anything about the dimensions of the page without more information. We do not know how the pictures are arranged - they might be in one column and six rows, two columns and three rows, or another arrangement.