You can 
put this solution on YOUR website! .
The rectangles are:  12 by 2   and   8 by 3.
If you know the multiplication table and are trained to quickly multiply numbers in your head MENTALLY,
you will be able to solve the problem and to get the answer in 4 (four) seconds.
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The post-solution note
    The unit for area is a  " cm^2 "  - - - not a " cm ".