do you know sponge recipe for a 10"x15" cake pan?!

Make This As Many Times As Needed To Fill Half or 3/4 of The Tin??
This recipe is for a round tin with a diameter of 6"

Sponge Cake – Basic recipe

Ingredients:
100g margarine
100g caster sugar
100g self raising flour
2 eggs
? tsp vanilla essence
25g jam
25g icing sugar

Method:
1. Turn the oven on gas mark 6 or 200° C. Grease and line two 6” sponge tins.
2. Cream the margarine and the sugar together.
3. Add the beaten egg a little at a time to the sugar and margarine mix.
4. Add the vanilla essence to the mixture.
5. Sieve the flour ad add gradually to the egg, margarine and sugar mix.
6. Divide the mixture between your two prepared sponge tins and spread evenly with a palette knife.
7. Bake for 15 – 20 minutes.
8. When cooked, turn out onto a cooling rack. (The cake is cooked if it springs back when touched with your fingertips).
9. Spread one half of the sponge with jam. Put the other half on top and decorate by sieving the icing sugar on top.

me =)