Find the formula to this question.

The local company installs fire pits in residential areas. The basic pit is installed in the center of and 8ft by 8ft square concrete pad. Some people want larger seating areas around the pit, so the company will add 1ft by 1ft concrete pavers around the pad. For example, to make a pad that is 12 by 12 ft, builders will add 2 rows of pavers around the 8 by 8 pad.

The owner of the company must calculate the number of pavers he needs to build a border around the original 8 by 8 pad that has a whole number for its border. Find a formula that will work.

Question

Find the formula to this question.

The local company installs fire pits in residential areas. The basic pit is installed in the center of and 8ft by 8ft square concrete pad. Some people want larger seating areas around the pit, so the company will add 1ft by 1ft concrete pavers around the pad. For example, to make a pad that is 12 by 12 ft, builders will add 2 rows of pavers around the 8 by 8 pad.

The owner of the company must calculate the number of pavers he needs to build a border around the original 8 by 8 pad that has a whole number for its border. Find a formula that will work.