What is the right way to cut a 9x13 cake pan into 3x3 bars?

To cut a 9x13 cake into 3x3 bars, first, make sure the cake is completely cooled. Use a sharp knife or a cake cutter to slice the cake into three equal sections lengthwise, creating three 3-inch wide strips. Then, turn the cake and cut each strip into three equal pieces, resulting in nine 3x3 bars. For cleaner cuts, wipe the knife between slices.