so 9x9 is 81 then 3x3 is 9
81
9 9
3 3 3 3
Prime factor decomposition of a number means writing it as a product of prime factors. To factorize a number, divide it by the first possible prime number. Take the resulting quotient below the number. If it is possible, continue dividing this quotient successively by the same prime number.
the second part looks like scientific notation (lmk if I'm wrong) not sure what to do here