If those are the dimensions in feet, for a rectangular home, just multiply them to get the area.
3 ft = 1 yd ⇒ 30 ft by 80 ft = (30 ÷ 3) yd by (80 ÷ 3) yd = 10 yd by 262/3 yd
30 in = 2.5 ft
80 ft X 544.5 ft = 43560 square ft which is equal to 1 acre.
There are 0.3125 16x16 squares in 80 sq ft.
Are the '76' and the '80' talking about feet ? Inches ? Meters ? Furlongs ? IF those numbers mean "76 ft" and "80 ft", and IF they are the sides of a rectangle, then the area is (76 ft x 80 ft) = 6,080 sq ft
The attic area of your 30 x 75 home is 2250 sq ft. / 40 = 56 1/4 packages. Be sure to deduct for covered areas you will not be insulating.
264.46 ft Direct Conversion Formula 80 m* 1 ft 0.3048 m = 262.4671916 ft
80 of them.
Two gutters, an 80 ft. one on each side. Most have 3 downpipes.
32-ft x 30-ft = 960 ft2
80 ft * 230 ft = 18400 sq ft = 0.4224 acres (to 4 dp).
30 ft