This is a 2 Bit Relay operated Multiplier. 2 momentary push switches used for two input numbers. After processing the numbers through Relays answer showing on third display. Wait for 10 to 15 seconds to stabilize all Relays to get proper Answer.
Here 4 AND Gate and 2 Half Adder has been used. As it is a 2 Bit machine so it can be make easily. I have published here 4x3 Hex Multiplier where 12 AND Gate, 4 Half Adder and 5 Full Adder has been used. Watch that project.
