conversations.from: human
conversations.value: Please show me the solution for: Alex has 4 pens in the first week of a month. Every week her pen collection doubles. How many more pens will Alex have than Jane if Jane will have 16 pens after a month?
conversations.from: assistant
conversations.value: If Alex has 4 pens in the first week of a month, she will have 4*2 = 8 pens in the second week.
  After her pen collection doubles in the third week, Alex will have 2*8 = 16 pens.
  In the last week of the month, Alex will have 2*16 = 32 pens after her pen collection.
  If Jane has 16 pens after a month, Alex will have 32-16 = 16 more pens than Jane.