how to do two complement multiplication and division of integers?

Question

I have read this post on binary multiplication using two complement. but it is not very clear to me. Even I have difficulty understanding the wiki article on this. I want to

Answer 1

Okay, let's see if I can make this simple enough for you.

Two's complement: IFF (If and only if) you have a negative number, first put it into the positive form. For sake of simplicity, all numbers will be 6 bit. The limit of the bits will limit how big your numbers can go. Besides that, what the size is doesn't matter.

Some numbers converted to their positive binary form -7: 000111 16: 010000 -22: 010110 1: 000001

Now for -7 and -23 ONLY we'll do two's complement on. So we flip the bits (1 -> 0 && 0 -> 1) and then add one.

 000111
 Goes to the complement + 1
 111000
 +    1
=111001

And for 22

 010110
 Goes to the complement + 1
 101001
+     1
=101010

Then you just add them together like you would any other number.

And it looks like somebody else already covered the multiplication part, so I won't bother repeating that.