Fibonacci

And thus, by means of these nine figures and the zero, any number can be written, however large it may be.

The multiplication of numbers is nothing else but a repeated addition.

Division is the inverse of multiplication.

And if you wish to find the square root of a number, you must first find the nearest square number.

For the more one practices, the more one becomes skilled.

The art of calculation is very useful and necessary for all people.

I have also included some problems that are useful for understanding the nature of numbers.

And I have striven to make this work as clear and concise as possible.

The knowledge of numbers is the foundation of all knowledge.

And I have taken care to explain everything in a simple and straightforward manner.

The more one studies, the more one learns.

And I have included many examples to illustrate the rules.

The art of calculation is a gift from God.

And I have striven to make this work useful to all who wish to learn the art of calculation, whether they be merchants or scholars.

The more one understands, the more one can achieve.

And I have taken care to present the whole subject in a logical and systematic manner.

The study of numbers leads to a deeper understanding of the world.

And I have included some problems that are useful for developing one's reasoning skills.

The more one calculates, the more one becomes proficient.

And I have striven to make this work a complete guide to the art of calculation.