added simple algorithm for getting the kgV

src/kgV/kgV.c

@@ -1,3 +1,19 @@
 #include <stdio.h>
 
-int kgV(int a, int b);
+int ggT(int a, int b){
+    // handles the zero cases
+    if(a == 0) return b;
+    if(b == 0) return a;
+
+    // Euclidean algorithm with modulo for getting the ggT
+    while (b != 0) {
+        int temp = b;
+        b = a % b;
+        a = temp;
+    }
+    return a;
+}
+
+int kgV(int a, int b){
+    return a*b/ ggT(a, b);
+}