I think that your question is incomplete but I will answer it anyway
In order to know how many pounds or lbs there will be in 7 crates we multiply 7 by 6.
7x6=42
Therefore, the heaviest possible weight in those 7 crates will be 42 pounds.
If only a bag can fit in a crate then we multiply 7 by 4 and get 28.
You can ask me questions about this if it is still unclear
