{{x11, x12, x13}, {x21, x22, x23}, {x31, x32, x33}}*{{2, 5, 6}, {1, 2, 5}, {1, 3, 2}} = {{30^-29, 5, -5}, {3, 10, 0}, {2, 9, -7}}

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.