Preheat oven to 350F and grease/flour,on cake pan

Prepare cake mix according to package.

Pour batter into prepared cake pan

Sprinkle cinnamon and sugar mixture over cake batter

With you stick of margarine cut up into 8 tablespoons

Drop margarine on top of cake batter - one in each corner and other 4 in middle of cake

Bake according to cake directions

The margarine while baking will pull the cinnamon and sugar mixture down through.