I need some help on a program for school that I am supposed to be able to input a integer number of unlimited size and mulitply it with another as well as divide,subtract, and add them. I have the add and subtract working. I read them as a string then convert each digit to a interger stored in a vector array and work it a digit at a time for the add and subtract. It works although its a bit awkward. I have no clue on the multiply and divide. Help before I loose all my hair.