A multiplication magic square is rather self explanatory. Instead of
adding the numbers in rows, columns and diagonals, they will be multiplied
to get to a magic constant. This magic square is not required to use
consecutive numbers
unlike the normal magic square. The first multiplication magic square ever
found, dates back to the year 1667 and was discovered by Antoine Arnauld.
This magic square has a magic constant of 4096. The smallest
multiplication magic square was found by Harry Sayles in 1913. For a 3x3
the magic constant is 216 and for a 4x4, 5040.
