conversations.from: human
conversations.value: Sara sent letters to her friend in China every month. She sent 6 letters in January, 9 letters in February, and in March she sent triple the number of letters she sent in January. How many letters does Sara send?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: Combining January and February, Sara sent 6 + 9 = 15 letters.
  In March, she sent 3 * 6 = 18 letters.
  Altogether, Sara sent 15 + 18 = 33 letters.