There are 60 bricks in a stack 20 feet high.
[tex]2 \times 10 = 20[/tex]
If you multiply the 2 by 10, you have to multiply 6 by 10.
[tex]6 \times 10 = 60[/tex]
So if there are 6 bricks in a 2 feet high stack, there are 60 bricks in a 20 feet high stack.
