code: remove one extra multiplication

main.cpp

@@ -10,7 +10,6 @@ int main()
     cout << "A + B = " << a + b << '\n'
         << "A - B = " << a - b << '\n'
         << "A * B = " << a * b << '\n'
-        << "A * B = " << a * b << '\n'
         << "A : B = " << a / b << '\n';
     return 0;
 }