conversations.from: human
conversations.value: A hay farmer harvested 560 bales of hay from 5 acres of grass per month last year. This year, he planted an additional 7 acres of grass. If the farmer also owns 9 horses and each horse consumes 3 bales of hay a day, how many bales of hay would the farmer have left by the end of December if he starts feeding them this year's hay beginning the first day of September?
conversations.from: assistant
conversations.value: For every acre of grass, the farmer can harvest 560/5 = 112 bales of hay each month.
  This year, the farmer has 7 + 5 = 12 acres of grass.
  He can expect to harvest 12 x 112 = 1344 bales of hay per month.
  The total hay production this year is 1344*12 = 16128
  From September to December, the farmer would have to feed his horses for a total of 30 + 31 + 30 + 31 = 122 days
  Each day his horse eats a total of 3*9 = 27 bales of hay.
  For the 122 days, the horses will eat a total of 27*122 = 3294 bales.
  The total number of bales remaining will be 16128-3294 = 12834.