# 4 bit multiplier using 2bit multiplier and 8bit FA

Joined May 2, 2014
23
I got this task on my homework.
I created the 2 bit multiplier and the 8 bit FA and now need to get only from them and the constants 0 and
1 4 bit multiplier. can you give me a clue ?
thanks a lot .

#### WBahn

Joined Mar 31, 2012
30,301
How would you multiply, by hand, two four-bit numbers if you could only multiply two-bit values at one time?

Think about how you multiply two two-digit numbers together by hand using only one-digit by one-digit multiplication at any point in the process.

Joined May 2, 2014
23
..

#### WBahn

Joined Mar 31, 2012
30,301

We can't help you if you aren't willing to put forth some effort.

Joined May 2, 2014
23
sorry for the last comment.
h

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#### WBahn

Joined Mar 31, 2012
30,301
I'm not in a position to download multi-megabyte files. Make them more rationally sized and I will take a look at them when I get a chance.