[Solved] How are multibit logic gate made?

GrandNecro Asks: How are multibit logic gate made?
I’m doing a lab about building an ALU. One of the instructions I’m supposed to make is A⨁B, however, A and B are 4-bits long but I’ve ever only learned about XOR taking 2 inputs.

So I’m wondering does A and B travel in serial and each pair of bits gets calculated at a time or is there some special circuit you can build to XOR multiple bits at once?

Also the simulator has adders that takes in multiple bits as well. Usually I learn that the adders can be combined to take in multiple bits input in parallel. So if InA and InB moves in the adder in series then is there a circuit inside the adder that converts the serial input to parallel input?

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