Who tell to whom1.''No, of course not.''2.''You have to learn addition and subtraction in order to domultiplication and division.''The old man got up.“You will come up with me?” he asked. I just remained seated.“I’m requesting you to come with me,” he said again. So I went up withhim. He took me to a room which had a gramophone in it and asked,“What kind of music do you like ?”“Well,” I answered, “I like songs that have words, and the kind ofmusic where I can follow the tune.”He smiled and nodded, obviously pleased. “You can give me anexample, perhaps ?”I told him I like anything by Bing Crosby. At once, I could hearBing Crosby’s voice filling the room.“Now, can you please tell me what you just heard?”, he said.The simplest answer seemed to be to sing the lines. So I sang itback to him. He smiled. “You’re not tone-deaf,” he said. I told him thiswas one of my favourite songs, something I had heard hundreds oftimes, so it didn’t really prove anything.“Nonsense !” said Einstein. “It proves everything! Do you rememberyour first arithmetic lesson in school? Suppose, at your very first contactwith numbers, your teacher had ordered you to work out a problem in,say, long division or fractions. Could you have done it?”“No, of course not.”“Exactly ! It’s like learning maths. You have to learn addition andsubtraction in order to do multiplication and division. Now I’m playingsomething a little more advanced.”It was John McCormack singing The Trumpeter. “Sing that back,”he ordered​