<image>As shown in the figure, a square paper is cut into four small squares, resulting in 4 small squares, referred to as the first operation; then, one of these squares is cut into four small squares again, resulting in a total of 7 small squares, referred to as the second operation; then, one of these squares is cut into four small squares again, resulting in a total of 10 small squares, referred to as the third operation; ..., based on the above operations, if you want to get 2011 small squares, the number of operations needed is ___ .
