Heat oven to 350°F (325°F for dark or nonstick pans). Grease or spray two 8- or 9-inch round cake pans. In large bowl, beat cake mix, water, oil and eggs with electric mixer on low speed 30 seconds, then on medium speed 2 minutes, scraping bowl occasionally. Divide batter between pans. Bake and cool cake as directed on box for 8- or 9-inch rounds. For easier handling, freeze cooled cake 45 minutes or until firm.