• This was published in 1202 shortly after Fibonacci returned to Italy and is the most recognized piece of work tied to the name, Fibonacci. In this work, Fibonacci revolved mathematics around arithmetic and algebra that he learned throughout his travels. In the first section, Fibonacci introduced the Hindu-Arabic place value decimal system as well as the use of Arabic numerals in Europe. The second section of this book deals with problems that were rounded towards merchants relating the price of goods, calculating profit transactions and converting between the various currencies in Mediterranean countries. The third section of this book is where the Fibonacci numbers and the Fibonacci sequence were born. Within this section, Fibonacci talks about problems involving perfect numbers, the Chinese Remainder theorem and even problems dealing with arithmetic and geometric sequences.