Vaughn paints his porch floor and also the porch floors of 9 neighbors. Each floor is a rectangle that is 8.2 feet long and 6.7 feet wide. Which equations represent the best estimate of the total area of all the porch floors that Vaughn paints? A. 8 × 6 = 48; 48 × 9 = 432 square feet
B. 8 × 7 = 56; 56 × 10 = 560 square feet
C. 10 × 7 = 70; 70 × 10 = 700 square feet
D. 10 × 10 = 100; 100 × 9 = 900 square feet