Chris bought 6 packages of napkins.
As the question says there were 200 napkins in each package.
We can use unitary method to find the number of napkins that Chris bought.
Unitary method is a process which is used to solve a problem by finding the value of a single unit.
We already have the value of a single unit which says:
1 package = 200 napkins
So,
6 package
napkins
So, Chris bought 1,200 napkins for his restaurant.