title: c++ - arithmetic operations with a very very large numbers
body: <p>I need to write a program that performs arithmetic operations
  But I have to do it with really really big numbers for example
  2837456897658923563425345 + 23784623874623874682736478236</p>
  
  <p>Because the numbers themselves are so large, I keep them as a string
  I just can not figure out how I can do simple things like adding and subtracting when I can not move those numbers to variables because they're so big</p>