The dimensions of the nation's smallest post office are 8 feet 4 inches by 7 feet 3 inches. Why would you use the measurement 8 feet 4 inches instead of 7 feet 16 inches?

Using 7 feet 16 inches would be incorrect because there are not 16 inches in a foot. Instead, there are 12 inches in a foot. Therefore, it is more appropriate to use 8 feet 4 inches because it accurately represents the total length of 8 feet plus 4 inches.