What does 712 x 712 equal?
Both the question and answer, ( 604938271603728395061729 or 724 ) are neither inspiring or particularly significant in themselves.
However, when we can express the answer in the following neat triangular shape, the real magic of the number 7 shines through!
Here is the same question and answer expressed in a diamond shape containing the “square” of the number 7, i.e. 49.
Moscow Puzzles ( Boris Kordemsky p169)