A Boy was playing in the park with his father sitting on a bench with his friend.
Father: Beta ! What is 9 multiplied by 8 ?
Beta: 76
Father : Good!
Father's friend got terrified.
Friend: Arre Yaar! 9 multiplied by 8 is 72. your boy said 76 and you congratulated him.
Father: He has improved a lot. He used to say 80.