First NAND Gate:

• Inputs: AAA and BBB
• Output: A⋅B‾\overline{A \cdot B}A⋅B

Second NAND Gate (acts as a NOT gate to invert the output of the first NAND gate):

• Inputs: Output from the first NAND gate connected to both inputs of the second NAND gate.
• Output: A⋅B‾‾\overline{\overline{A \cdot B}}A⋅B which simplifies to A⋅BA \cdot BA⋅B