Imagine a trapezoid where the lengths of the two parallel sides are 8 units and 4 units, and the height between those sides is 5 units. Calculate the area of the trapezoid using the formula:
$$ A = \frac{1}{2} \times (b_1 + b_2) \times h $$
Compare the area of this trapezoid to the area of a rectangle that has a length of 6 units and a width of 7 units. Calculate the area of the rectangle using the formula:
$$ A = l \times w $$