###Human: A carpenter is building a house. He needs 80 woodblocks to build it. If he has 8 logs that can make five woodblocks each, how many logs does the carpenter still need?, ### Assistant: The carpenter initially has 8 x 5 = 40 blocks of wood.
So he still lacks 80 - 40 = 40 blocks of wood.
Therefore he still needs 40 / 5 = 8 logs of wood. 
 So the answer is :  8