conversations.from: human
conversations.value: James and John combine their friends lists.  James has 75 friends.  John has 3 times as many friends as James.  They share 25 friends.  How many people are on the combined list?
  Give me a detailed solution.
conversations.from: assistant
conversations.value: John has 75*3=225 people on his friends list
  So that means there are 225+75=300 people on the list
  So once you remove duplicates there are 300-25=275 people