John buys 3 puzzles.  The first puzzle has 1000 pieces.  The second and third puzzles have the same number of pieces and each has 50% more pieces.  How many total pieces are all the puzzles?
The second puzzle has 1000*.5=<T>multiply(1000, 0.5)=500.0 more pieces than the first
So it has 1000+500=<T>add(1000, 500)=1500 total pieces
That means those two puzzles have 1500*2=<T>multiply(1500, 2)=3000 pieces
So in total there were 3000+1000=<T>add(3000, 1000)=4000 pieces
