My teacher uses these shelves to keep homework papers. There are 3 columns with shelves of homework papers, and there are 8 shelves with homework papers in each column. How many shelves are there in all?

Hey, my name is Jennifer. I am 8 years old. I like to do karate. I have my blue belt. My favorite subject is science. I love doing experiments. Also, I like gym class in my school. My favorite animals are dogs. I have a pugapoo and a cocker spaniel. I love to read books. My favorite book is The Tale of Despereaux. My favorite food is pasta. I love to jump rope. I also love reading and learning about history.