— Vovochka, let’s say you have 10 rubles. You asked your father for another 10 r

– Vovochka, let’s say you have 10 rubles. You asked your father for another 10 rubles. How much money will you have in total?
– 10 rubles, Mary Ivanna.
– Too bad, Vovochka, you don’t know math at all!
– And you, Mary Ivanovna, don’t know my father at all!