| 1. | If executing multiply instructions, a 3 X multiplicand is generated.
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| 2. | Suppose for simplicity that the multiplicand has three digits.
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| 3. | Find the product of the multiplier and the tens-digits of the multiplicand.
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| 4. | The ones-digit of the multiplicand is 9 and the multiplier is 3.
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| 5. | Let the first factor be called the multiplicand.
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| 6. | The hundreds-digit of the multiplicand is 7, while the multiplier is 3.
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| 7. | The ones-digits of the multiplicand and multiplier form a column : the ones-column.
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| 8. | After writing the multiplicands on the sides, consider each cell, beginning with the top left cell.
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| 9. | As a rule of thumb, Karatsuba is usually faster when the multiplicands are longer than 320 640 bits.
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| 10. | The SSEM had included two registers, implemented as Williams tubes : the multiplicand and multiplier for a multiplication operation.
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