Answer:
see attached
Step-by-step explanation:
You want the attached table of group size and number of groups filled in.
Product
As you know from your early experience with multiplication and division relations, either factor of a product can be found by dividing the product by the other factor:
P = a·b ⇒ a = P/b, or b = P/a
Here, the total is equal to the product of the number of groups and the number in each group. That means the missing number on each line can be found by dividing the total by the known number on the line.
When the numbers are already in a spreadsheet, you can let the spreadsheet do the arithmetic.
