About Leonardo Fibonacci

Leonardo fibonacci is Italian mathematician that introducing arabic numeral system. His father Guglielmo was nicknamed Bonaccio.Leonardo's mother, Alessandra, died when he was nine years old.
Leonardo do the travel to north afrika but on the way Leonardo find that number system arab is more practically in using than number romawi.Then he studied that science.At 1202, in age of 27, he write down that have been studied in book "Liber Abaci”. This book greeted by literate clan of Europe,The book advocated numeration with the digits 0–9 and place value.This numeral system disseminate to all worlds angles.