How many yards of soil would you need to buy in order to fill up a garden whose measurements are 25 feet long by 18 feet wide by 8 inches high?

How many yards of soil would you need to buy in order to fill up a garden whose measurements are 25 feet long by 18 feet wide by 8 inches high?
"How many yards of soil would you need to buy in order to fill up a garden whose measurements are 25 feet long by 18 feet wide by 8 inches high?"