80 yards x 27 (cubic feet per yard) x 7.48 (gallons per cubic foot) 30 (gallons per garbage can) = 538.56 garbage cans.

That is, (80 x 27 x 7.48) 30 = 538.56

Lifetime effect on the environment:

* 70 yards initial reroof (80 yards – 10 yards going to landfill = 70 yards)
* 80 yards first reroof prevented at 17 years
* 80 yards second reroof prevented at 34 years
* 80 yards at 50 years, 100% of your EcoWise™ roof will be recyclable!

70 + 80 + 80 + 80 = 310 yards

(310 x 27 x 7.48) ¸ 30 = 2086 garbage cans!

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