Now, I'm trying to implement like this.
"How many $4\times4$ multiplier would you need to perform an $8\times8$ multiply. how an $8\times8$ multiplier would be created using only $4\times4$ multipliers?"
But I can't get any hint.
Does anyone know how to solve this problem? How can I approach this problem?
Update : Sir thank you very much. But your answer a quite different from here. http://verilog-code.blogspot.kr/2014/01/design-and-implementation-of-16-bit.html?m=1
You can check that 8x8 multiplier need to 2 4x4 multiplier. Also 3 addder.