There are three sets of windows in our classroom. There are nine window panes in each set. How many window panes are in our classroom all together?

Hi! I am Jackson and I am nine years old. I live in the U.S.A. My hobbies are: reading, writing scary stories, camping, building things, and finding out new things. I am a boy and am in 3rd grade. Things I like are: dragons, transformers, mythical creatures, and swords. I have moved around a lot so I have seen many places and houses. I cannot wait to have a blogpal and meet new people.