prompt: Tommy has 13 items in his pencil case. The pens are twice as many as the pencils and there's one eraser. How many pencils are there?
messages.content: Tommy has 13 items in his pencil case. The pens are twice as many as the pencils and there's one eraser. How many pencils are there?
messages.role: user
messages.content: There are 13 items - 1 eraser = <<13-1=12>>12 pens and pencils.
  There are 12 items / 3 = <<12/3=4>>4 pencils.
  #### 4
messages.role: assistant