Welcome to JavaRanch, Mohsin
Please
UseAMeaningfulSubjectLine when you post anything on JavaRanch. Also please
UseCodeTags when you post a source code - It's unnecessarily hard to read the code otherwise. I've edited your post accordingly.
Getting into your question, what did you mean by "multiplication is not happening.", are you getting any exception, incorrect result, or something else? Please
TellTheDetails.