Given the task definition and input, reply with output. You are given a math word problem and you are supposed to only use multiplication or division operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Context: Jesse's rooms are 19 feet long and 18 feet wide. If she has 20 rooms in all 

 Question: How much carpet does she need to cover the floors of all rooms?

6840