conversations.from: human
conversations.value: Explain how to solve this math problem: In Mary's class, there are 25 students. Their teacher told them they could pay $50 each to finance a big science project that they and their society would benefit greatly from. They all paid the full amount except for 4 students, who paid half. How much was the class able to gather together?
conversations.from: assistant
conversations.value: The original amount is $50 so half is $50/2 = $25
  4 students paid half ($25) for a total of 4*$25 = $100
  There are 25-4 = 21 students left
  21 students paid the full amount ($50) for a total of 21*$50 = $1050
  They were able to gather a total of $100+$1050 = $1150