Will you give me 2 packages of water for 1 package of firewood?
I can give two packages of food in exchange for your firewood.
What about you take all the firewood and i take all the water?
I can do that.
That was cool. And will you give me 2 packages of food?
That sounds like a fair deal. I can do that.
Seems like we have a deal.
Okay. Just so we're clear, I take 3 firewood and 1 food. You take 3 water and 2 food. Correct?
Yea, this is a fair deal.
Very good. Let's submit the deal