Why wouldn't the answer be 60?

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 644, or 60. So why did the explanation say that it would be 444*4 (256) minus 4, or 252?