conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: John has taken 10 pictures every day for the past 3 years.  He saves them in raw format so each memory card can store 50 images.  Each memory card costs $60.  How much does he spend on memory cards?
conversations.from: assistant
conversations.value: He takes pictures for 3*365=1095 days
  So he takes 10*1095=10,950 pictures
  That means he needs 10950/50=219 memory cards
  So he spends 219*60=$13140 on memory cards