The Math Kernel Library (MKL) is a library of computer functions that can be used to quickly and accurately solve math problems. It is used by computer scientists and mathematicians to solve difficult and complicated math problems. The library contains functions for solving linear equations, multiplication and division, and calculation of integrals. These functions save time and provide more accurate solutions than other methods. Essentially, the Math Kernel Library is like a collection of very powerful math calculators that can solve difficult math problems quickly and accurately.