conversations.from: human
conversations.value: Find a solution for this math problem: Chantal knits sweaters to sell. Each sweater takes 4 balls of yarn. Each ball of yarn costs $6. How much money will Chantal gain in all 28 sweaters if she sells each sweater for $35?
conversations.from: assistant
conversations.value: The 28 sweaters need 28 x 4 = 112 balls of yarn.
  So, Chantal will spend 112 x $6 = $672 in all for the balls of yarn.
  Her total earnings for selling 28 sweaters is $35 x 28 = $980.
  Therefore, Chantal will gain $980 - $672 = $308.