A wizard casts a spell that produces 882 glimmering lights over a span of 21 days. That's an average of how many lights a day?

In comparison, another wizard casts a spell that produces 460 glowing orbs in 20 days. What is the daily average here?

Now, let's assume that the difference in their daily averages times the second wizard's daily average is a magical constant represented by 'n'. Can you find out what 'n' is?