Salutations!
number of copies in each run = 512
number of books in 38 runs = [tex]512*38[/tex]
= [tex]19456[/tex] books.
in 38 runs, there would 19456 copies.
Lets recheck our answer. To recheck our answer, just divide 19456 by 38 --
[tex]19456/38 = 512[/tex]
The answer is correct!
Hope I helped (:
Have a great day!
