First, convert those inches to feet. 7in =ish 0.5833333 (you find this by dividing 7/12 on a calculator) Now you just square 9.583333333 9.583333333^2 9.583333333 * 9.583333333 91.84027777ish Rounded to the nearest foot, means the answer is 92ft.
You can solve this by adding up .5 8 times to equal 4. Another way to look at it is that you have 4 individual pieces that are a foot long and you decide to split all of them in half. Let me know if you have any other questions.
