conversations.from: human
conversations.value: Can you walk me through the solution of: Hanna has twice as many erasers as Rachel.  Rachel has three less than one-half as many erasers as Tanya has red erasers.  If Tanya has 20 erasers, and half of them are red, how many erasers does Hanna have?
conversations.from: assistant
conversations.value: Half of Tanya's 20 erasers are red, so she has 20/2=10 red erasers.
  One-half as many erasers as Tanya has red erasers is 10/2=5 red erasers.
  Rachel's three less than one-half as many erasers as Tanya's red erasers, which is 5-3=2 erasers.
  Hanna has twice as many erasers as Rachel, for a total of 2*2=4 erasers.