It says that we can use the numbers 1,1,1,2,2,2,3,3,3,4,4, and 4.
And if you group them like this - (1,2,3,4) (1,2,3,4) (1,2,3,4), the equation would be 444, or 64. When you minus out the "bad" options, you would get 64-4, or 60. So why did the explanation say that it would be 444*4 (256) minus 4, or 252?