How do I change the amount of wood that comes from a tree?

I'm doing a moba style map and I wanna change the amount of wood that comes from a tree from 100 to something like 1,000,000 because each player will only have 9 trees to gather resources from, due to limited space.

I know that I can modify attributes but that only seems to work with things like hp and armor and stuff.

Is there another way?