build: добавление произведения чисел a и b

main.cpp

@@ -13,5 +13,8 @@ int main() {
     int difference = a - b;
     cout << "Difference of A and B is: " << difference << endl;
 
+    int proizv = a * b;
+    cout << "Proizvedenie of A and B is: " << proizv << endl;
+
     return 0;
 }