title: Base case for Karatsuba Multiplication
body: <p>Just wondering why the base case for Karatsuba multiplication ( shown here: <a href="http://www.sanfoundry.com/java-program-karatsuba-multiplication-algorithm/" rel="nofollow noreferrer">http://www.sanfoundry.com/java-program-karatsuba-multiplication-algorithm/</a>) is chosen to be "N&lt;= 10"? I found "N&lt;= 4, 3, 2 ,1 " will not give me a correct result. Anyone can explain?</p>