Happy new year ....

Hi i need to multiply two numeric string value i already created one but its not fast enough . I use same method when we doing in paper first i multiply all characters and saved in a vector and then later added all multiplyed output using string add function that i created . can't post that code becuse its big and not readable
I need a better multiply function how can i create one

And what is arbitrary precision i goto this website its good is this method faster than others

http://www.javascripter.net/math/cal...calculator.htm