conversations.from: human
conversations.value: John has 25 horses.  He feeds each horse twice a day and feeds them 20 pounds of food at each feeding.  He buys half ton bags of food.  How many of those will he have to buy in 60 days?
  Give me a clear explanation.
conversations.from: assistant
conversations.value: He feeds each horse 2*20=40 pounds of food a day
  So he uses 40*25=1000 pounds of food a day
  That means in 60 days he uses 60*1000=60000 pounds of food
  Each bag of food is 2000*.5=1000 pounds
  So he needs to buy 60000/1000=60 bags of food