prompt: A small store made 50 posters to advertise their products. Two-fifths of them are small posters while half of them are medium posters. The rest are large posters. How many large posters are there?
messages.content: A small store made 50 posters to advertise their products. Two-fifths of them are small posters while half of them are medium posters. The rest are large posters. How many large posters are there?
messages.role: user
messages.content: 50 x 2/5 = <<50*2/5=20>>20 posters are small.
  And 50/2 = <<50/2=25>>25 posters are medium.
  So 20 + 25 = <<20+25=45>>45 posters are not large.
  Therefore, 50 - 45 = <<50-45=5>>5 posters are large.
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messages.role: assistant