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I am working on a program in C as a part of Homework in which I have to get the product of two long numbers which are taken as character string. eg: 123456789021 and 132456789098. Since it is taken as a string, I converted them to long long int for the multiplication. But the resulting product will be very large(larger than long long int I guess). Can anyone please suggest me a method to perform this multiplication?
Here’s one approach: Consider how you would multiply these numbers by hand, on paper. Implement this method in C. You will have to discover:
0 <= d < 10