Why do this
requires both clear thinking and the use of prime factors. It does
not require much knowledge of volume and capacity.
What are the factors of $595$?
What is its most obvious factor?
Why not try dividing by $5$?
What are the factors of the result of doing this?
Why not call the "numbers" g, o and v?
Does the problem ask which number is which?
Learners could go on to Stars
work on factors.
Suggest doing Three
which is a simpler problem involving factors.