Booth Algorithm
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00 no opration
10 Prod = Prod - Mcand
11 no opration
01 Prod = Prod + Mcand
take 2 x 7 for example
Opration Multiplicand Produced
0 initial value 0010 0000 0111 0
1 P = P - M 1110 1110 0111 0
shift 0010 1111 0011 1
2 no opration 0010 1111 0011 1
shift 0010 1111 1001 1
3 no opration 0010 1111 1001 1
shift 0010 1111 1100 1
4 P = P + M 0010 0001 1100 1
shift 0010 0000 1110 0
