if you set it up shown above you do 5 times 4 then five times 1. then underneath that do 6 times four and then six times 1. then you add those two numbers. sorry if this sounds confusing its hard to explain and easier to explain when actually doing the problem by hand
Thanks for sharing. What question are they trying to answer with their experiment ? What results do they expect ? What results do they actually get ? Do you have a question to ask ?