Answer:
146304 marbles
Explanation:
We do not need to worry about the color part, at least right now
One box contains 576 marbles
To find how many are in 2 boxes we would do 576 * 2
To find 254, we would do 576 * 254
Now, I would suggest using lattice multiplication here. If you do not know how to do that, long multiplication works fine.
I can't show that here, but I can show the answer:
576 * 254 = 146304
So, there are 146304 marbles is 254 boxes