High-precision algorithms

High-precision algorithm: (from Baidu Encyclopedia)
It belongs to the mathematical calculation method of processing large numbers. In general scientific calculations, it will often count to hundreds of or more of the decimal point, or perhaps hundreds of millions of to tens of billions of of a large number.
Generally this kind of numbers we collectively referred to as high-precision number, high-precision algorithm is a computer for the large data of a simulation plus, minus, multiply, divide, powers, factorial, root and other operations. For a very large
Numbers cannot be stored properly in the computer, so the number is torn apart, split into one-bit, or four-bit four-bit storage into an array, with an array to represent a number,
So this number is called the high precision number. High-precision algorithm is able to deal with high-precision number of various operations of the algorithm, but because of its particularity, so from the general number of the algorithm separation, playing independently.

My understanding:

The number of participating operations exceeds the range of operations of int, long long int, etc., and can only be simulated by hand.

High-precision algorithms