Write the sum of numbers as a product of their gcf and another sum 36+45

So, the sum of numbers will be the result of 36+45, that is 81.

Let's find the GCF: it's at least 9, since both numbers are divisible by 9 (36/9=4; 45/9=5)

so 81 (the sum of the numbers) equals 9*9 (where 9 is the gfc)

and the answer is 81=(4+5)*9, where 4+5 is the "another sum".

Is it a multiple choice