All you need to do is multiply the labeled sides together. See where the dotted line is? Imagine that you take the piece of the shape that is being separated by the line and flip it upside down, then put it on the other side of the parallelogram. Now you have a rectangle, and the sides are still the same length. The formula for the area of a rectangle is length times width, so do 6 times 8. You get 48 if you do it right.