conversations.from: human
conversations.value: Each week Carina puts 20 more seashells in a jar than she did the week before. If there are 50 seashells in the jar this week, how many will there be in a month?
  How to solve this?
conversations.from: assistant
conversations.value: In one week there will be 50+20=70 seashells
  In two weeks there will be 70+20=90 seashells
  In three weeks there will be 90+20=110 seashells
  In four weeks there will be 110+20=130 seashells