conversations.from: human
conversations.value: Can you walk me through the solution of: Sabrina gave 10 cookies to her brother. Her mother gave Sabrina half the number of cookies she gave her brother. Then Sabrina gave two-thirds of her cookies to her sister. If Sabrina had 20 cookies at the start, how many cookies are left with her?
conversations.from: assistant
conversations.value: Sabrina had 20 - 10 = 10 cookies left after giving 10 cookies to her brother.
  Sabrina's mother gave her 10/2 = 5 cookies.
  So, she had 10 + 5 = 15 cookies then.
  She gave 15 x 2/3 = 10 cookies to her sister.
  Therefore, she only has 15 - 10 = 5 cookies left.