prompt: Lana aims to sell 20 muffins at the bake sale. She sells 12 muffins in the morning. She sells another 4 in the afternoon. How many more muffins does Lana need to sell to hit her goal?
messages.content: Lana aims to sell 20 muffins at the bake sale. She sells 12 muffins in the morning. She sells another 4 in the afternoon. How many more muffins does Lana need to sell to hit her goal?
messages.role: user
messages.content: Lana sold 12 muffins and has to sell 20 - 12 = 8 to hit her goal before the bake sale ends.
  When she sells another 4 in the afternoon Lana has 8 - 4 = <<8-4=4>>4 muffins left to sell to meet her target.
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messages.role: assistant