english: Indeed, the person we call Fibonacci was actually named Leonardo of Pisa, and these numbers appear in his book "Liber Abaci," which taught the Western world the methods of arithmetic that we use today.
non_english: Fibonacci’s echte naam was eigenlijk Leonardo van Pisa, en deze getallen komen voor  in zijn boek "Liber Abaci". Dit boek bracht de westerse wereld de rekenkundige methoden bij  die we vandaag gebruiken.