# 4 bit multiplier logic gates diagram

I have an assignment that requires building 4-bit Multiplier in two ways:

1) using only FA1bit and AND logic gates.

2) using only FA8bit(Full adder for 8bit numbers) , Mul2bit(Multiplier for numbers with 2 bits) and AND logic gates .

i figured out the first way , but i cant figure out how to do the second way .

(of course im talking about binary numbers)

thanks