test multiply_0           ... bench:          42 ns/iter (+/- 0)
test multiply_1           ... bench:       4,271 ns/iter (+/- 68)
test multiply_2           ... bench:     289,339 ns/iter (+/- 10,532)
test multiply_3           ... bench:     663,387 ns/iter (+/- 17,381)
test multiply_4           ... bench:       7,474 ns/iter (+/- 384)
test multiply_5           ... bench:      16,376 ns/iter (+/- 254)

Introduces Half-Karatsuba in multiplication module for cases where there is a
significant size disparity between factors. Optimizes performance by evenly
splitting the larger factor for more balanced multiplication calculations.

-test multiply_0           ... bench:          42 ns/iter (+/- 0)
+test multiply_0           ... bench:          42 ns/iter (+/- 0)

-test multiply_1           ... bench:       4,271 ns/iter (+/- 68)
+test multiply_1           ... bench:       4,242 ns/iter (+/- 164)

-test multiply_2           ... bench:     289,339 ns/iter (+/- 10,532)
+test multiply_2           ... bench:     288,857 ns/iter (+/- 8,715)

-test multiply_3           ... bench:     663,387 ns/iter (+/- 17,381)
+test multiply_3           ... bench:     583,635 ns/iter (+/- 14,997)

-test multiply_4           ... bench:       7,474 ns/iter (+/- 384)
+test multiply_4           ... bench:       6,649 ns/iter (+/- 164)

-test multiply_5           ... bench:      16,376 ns/iter (+/- 254)
+test multiply_5           ... bench:      13,922 ns/iter (+/- 323)

Per suggestion from cuviper