Multiple cross products

Multiple cross products are like puzzles. Imagine you have several sets of pieces from different puzzles. You can join the pieces from all of the puzzles together and make one really big puzzle. That's the same thing as multiple cross products. You can combine two or more different things (like numbers or lists of words) and use the pieces to create something new. For example, you could add together two numbers and get a new number, or make a list of words by putting together words from two or more different lists.