prompt: Thomas is making hummus. One of the ingredients in a hummus recipe is chickpeas. For one serving of hummus, the recipe calls for 1 cup of chickpeas. In a can of chickpeas, there are 16 ounces of chickpeas. In one cup of chickpeas, there are 6 ounces. To make 20 servings, how many cans of chickpeas should Thomas buy?
messages.content: Thomas is making hummus. One of the ingredients in a hummus recipe is chickpeas. For one serving of hummus, the recipe calls for 1 cup of chickpeas. In a can of chickpeas, there are 16 ounces of chickpeas. In one cup of chickpeas, there are 6 ounces. To make 20 servings, how many cans of chickpeas should Thomas buy?
messages.role: user
messages.content: For 20 servings, Thomas needs 20*1 = <<20*1=20>>20 cups of chickpeas.
  To have 20 cups, Thomas needs 20*6 = <<20*6=120>>120 ounces.
  120 ounces/16 ounces = <<120/16=7.5>>7.5 cans of chickpeas.
  Since Thomas cannot buy half a can, he needs to buy 8 cans.
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messages.role: assistant