Mental math brings higher learning , increased usage allows students to live healthier, smarter lifestyles. According to a research paper published on the U.S. National Institutes of Health's National Library of Medicine, students with strong number sense obtain greater overall mathematical success and often perform better at both written calculations and applied problem solving. Peter Chew Mental Calculation (Multiplication) is a technique that can be faster and more accurate than regular calculators for certain calculations. Simple calculators may give an approximate answer for calculations with more than 10 digits, but with Peter Chew Mental Calculation (Multiplication), you can get the exact answer for calculation with answer for calculations with more than 10 digits. Peter Chew Mental Calculation (Multiplication) can help you quickly get exact answers to certain calculations, even multiplication of numbers with more than 11 digits that cannot be calculated by advanced calculators such as wolfram alfa. Therefore, Peter Chew Mental Calculation (Multiplication) Method, faster and better than Calculators (Simple and Computation Intelligence) for certain calculations. Mathematical proof is absolute, which means once a theorem is proved, it is proved forever. Until a proven though, the statement is never accepted as a true one. Therefore, Mathematical proof for Peter Chew Mental Calculation (Multiplication) Method also provided at this article.