conversations.from: human
conversations.value: 36 liters of diesel fuel is worth €18. The tank of this pickup truck can hold 64 liters. How much does a full tank of diesel fuel cost?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: A liter of diesel costs 18/ 36 = 0.5 €.
  64 liters of diesel fuel cost 0.5 X 64 = 32 €