This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
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.