I was struggling with this but this comment chain has clarified it - you can re-use an egg if it doesn't break. So for example if n = 2 and m = 14, if on your first two tries your eggs break then you don't get any more tries.

Then what's a "try"? I'm also confused by this. How are eggs not tries?

You throw one egg at a time. If it breaks it's gone.

I have a problem with the explanation on tries:
Can you throw multiple eggs at once per try?
In the example of 2;14, in the first try, can I throw my eggs at the same time or its only ONE egg per try?
So if I have 10 eggs and 10 tries, will I get 100 drops (10 per try) OR 10 egg drops (one per try)?