refactoring:replaced karatsuba with karatsu

Linkes-Twix

@@ -0,0 +1 @@
+Subproject commit b5e43678fdb145c0146f369ab05bf758ae913abf

src/multiplication.c

@@ -230,7 +230,7 @@ int bitwisee_multi(int num1, int num2) {
     return result;
 }
 
-int karatsuba_multi(int num1, int num2) {
+int karatsu_multi(int num1, int num2) {
     // Base case: If numbers are less than 10, return their product directly
     if (num1 < 10 || num2 < 10) {
         return num1 * num2;
@@ -246,9 +246,9 @@ int karatsuba_multi(int num1, int num2) {
     int d = num2 % (int)pow(10, m2);
 
     // Calculate intermediate products
-    int ac = karatsuba_multi(a, c);
-    int bd = karatsuba_multi(b, d);
-    int ad_bc = karatsuba_multi(a + b, c + d) - ac - bd;
+    int ac = karatsu_multi(a, c);
+    int bd = karatsu_multi(b, d);
+    int ad_bc = karatsu_multi(a + b, c + d) - ac - bd;
 
     // Calculate the final result
     return ac * (int)pow(10, 2 * m2) + ad_bc * (int)pow(10, m2) + bd;

src/multiplication.h

@@ -31,7 +31,7 @@ int repeated_division_multi(int num1, int num2);
 int bernoulli_multi(int num, int bernoulli);
 float power_multi(float base, int exponent);
 int bitwisee_multi(int num1, int num2);
-int karatsuba_multi(int num1, int num2);
+int karatsu_multi(int num1, int num2);