creepypasta rp? (im a creepypasta called the Stargazer but my friends call me wolfie cause Im a wolf. I ran away from the palace I came from because I didn't like how they controlled my life. I cut a star I'm my victims chest so if they try to fight their organs spill out. If they don't move they bleed to death

Many of the houses have fireplaces that are 15% efficient and use 15 kg of wood to heat a room to 20 degrees celsius. wanting to reduce their ecological footprint, several of the homeowners are considering switching to woodstoves that are 75 percent efficient. if they do change to using a woodstove, how many kilograms of wood will they save per use?