Lab 6 is FINISHED!!! Lab 7 is in progress

Java lab 6 was "interesting" but I finally got it finished. Hopefully, someone will explain what matrix multiplication is used for because though I was shown what to do to get the correct answers and managed to figure out the logic to write it, I have no idea why anyone would want to do that. Have I mentioned that I've got a math disability and never got past beginning Algebra?

( what I was up against with this assignment in simple terms )