This book is about bonded numbers with bonded numbers. Multiplication is reduced to addition. In the text, the author has given an example of multiplication of 108 digits bonded number with another number consisting of 108 digits. In about 5 minutes, the answer consisting of 216 digits is obtained in one straight line. It is so because multiplication has been reduced to addition. The system has the in-built test of the correctness of the answer. Bonded numbers show that every multiplication has two distinct parts – right hand part and left hand part.