i am needing help on the following
(12x^7)(16x^9)=2*2*2*3*3*x^7*x^9
(3x^9)(16x) =3*2*2*2*2*x^9*x
This is a fraction I am not sure how they got the first terms factored down to what is on the right side of the = sign
Please help

What you have to the right of the equals sign are the PRIME FACTORS of each NUMBER, and the product of the variables.
For example, the PRIME FACTORS of 12 are: 2, 2, and 3, while the PRIME FACTORS of 16 are: 2, 2, 2, and 2.
However,
is INCORRECT, and should be: