conversations.from: human
conversations.value: Break down this math problem: A kilogram of pork costs $6 while a kilogram of chicken costs $2 less. How much will a 3-kilogram of chicken and a kilogram of pork cost?
conversations.from: assistant
conversations.value: A kilogram of chicken costs $6 - $2 = $4.
  Three kilograms of chicken cost $4 x 3 = $12.
  So, a 3-kilogram of chicken and a kilogram of pork cost $12 + $6 = $18.