Instructions:

1. Preheat the oven to 350°F (175°C). Grease and flour a 9-inch round cake pan.
2. In a medium-sized mixing bowl, combine the flour, baking powder, baking soda, and salt. Set aside.
3. In a separate large mixing bowl, cream together the butter and sugar until light and fluffy.
4. Add the eggs, one at a time, beating well after each addition. Stir in the vanilla extract.
5. Gradually add the flour mixture to the butter mixture, alternating with the milk, and mix until just combined.
6. Fold in the diced strawberries.
7. Pour the batter into the prepared cake pan and smooth the top.
8. Bake the cake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.
9. Allow the cake to cool completely before removing it from the pan. Serve and enjoy!

Note: You can add some whipped cream or frosting on top of the cake if you prefer. You can also add some more fresh strawberry as garnish.