The given polynomial is:

The first step to factor taking out the GCF is to write each term in prime factored form, so:

The second step is to identify the factors common in all terms, they are: 3xcxd
Finally, factor out the GCF:

The answer is above
It's 768 sqaure centimeters
Elaborate, where’s the picture of the problem?
The base of the prism is a 6 cm square. Any cross section parallel to the base has the same dimensions as the base, so is a 6 cm square. Its area is ...
(6 cm)² = 36 cm²