What are the non-recursive steps of Karatsuba Multiplication?

What are the non-recursive steps of Karatsuba Multiplication?



With numbers x and y split into four numbers: a, b, c, d.

1) Compute a × c.
2) Computer b × d.
3) Computer step 3 - step 2 - step 1.
4) Add (step 1 × 10^n) + step 2 + (step 3 × 10^(n/2)).

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