conversations.from: human
conversations.value: Solve the math problem: Alice wants 1000 folded paper cranes. She folds half by herself, and a friend folds a fifth of the remaining paper cranes for her. How many paper cranes does Alice still need to fold?
conversations.from: assistant
conversations.value: Alice folds 1000 * 0.5 = 500 paper cranes by herself.
  This leaves 1000 – 500 = 500 paper cranes left to fold.
  A friend folds a fifth of the remaining amount, so they have folded 500 / 5 = 100 paper cranes for her.
  This means there is a total of 1000 – 500 – 100 = 400 paper cranes left for Alice to fold.