Here's a breakdown:
* Saquen: This is the imperative form of the verb "sacar" (to take out), meaning "take out" or "get". It's plural, meaning it's addressing multiple people.
* Una: This means "a" or "one."
* hoja: This means "sheet" or "leaf."
* de papel: This means "of paper."
So, the full phrase means "Take out a sheet of paper" or "Get a sheet of paper".