preheat oven to 350°F

prepare topping: place cereal in a plastic bag and crush with a rolling pin.

in a bowl thouroughlly combine crushed cereal,flour,cinnamon,brown sugar and melted margarine. set aside.

prepare cake: in a large mixing bowl combine cake mix and cinnamon.

add apple pie filling,water and melted margarine.

stir until well blended.

spread cake batter into a greased 9x13 inch cake pan.

sprinkle topping onto cake.

bake 40~50 min. or until toothpick comes out clean.

cool and serve.