Spread the strawberry pie filling in a greased 9x13 inch cake pan*.
Spoon on the pineapple, then the dry cake mix, then the margarine.
Top with coconut and crushed nuts.
Bake at 325 degrees for 60-75 minutes. Serve warm or cold.
Before serving, top individual pieces with sliced bananas, whipped cream, and chocolate syrup.
*I made mine in a round Corningware dish, but traditional dump cake is made in a 9x13 inch pan.