IV. BCMath Arbitrary Precision Mathematics Functions
    These functions are only available if PHP was configured with
    --enable-bcmath.
   
Note: 
     Due to changes in the licensing, the BCMATH library is distributed
     separate from the standard PHP source distribution. 
     You can download the tar-gzipped archive at the url:
     http://www.php.net/extra/number4.tar.gz.  Read the
     file README.BCMATH in the PHP distribution
     for more information.
    
- Table of Contents
- bcadd — Add two arbitrary precision numbers
- bccomp — Compare two arbitrary precision numbers
- bcdiv — Divide two arbitrary precision numbers
- bcmod — 
     Get modulus of an arbitrary precision number
    
- bcmul — Multiply two arbitrary precision number
- bcpow — 
     Raise an arbitrary precision number to another
    
- bcscale — 
     Set default scale parameter for all bc math functions
    
- bcsqrt — 
     Get the square root of an arbitray precision number
    
- bcsub — 
     Subtract one arbitrary precision number from another