Using Place Value to Work Out Multiplication

In class I havebeen learning to use plave value to work out multipliction. Here is a DLO can you work out 7x20? And tell me how you worked it out in the comment like I did on the DLO.

DLO

In maths we have been lerning about primerter, area and volume. We had to make a DLO about one of these maths I chose primerter. Here is mine.