conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: To make 1 liter of juice, Sam needs 5 kilograms of oranges. Each kilogram of oranges costs $3. How much money would Sam have to spend to make 4 liters of juice?
conversations.from: assistant
conversations.value: To make 4 liters of juice, Sam needs 4 * 5 = 20 kilograms of oranges.
  If one kilogram of oranges costs $3, then 20 kilograms would cost 20 * 3 = $60.