<human>:  A hot air balloon with 200 balloons is blowing up. After about half an hour, 1/5 of the total number of balloons in the hot air balloon have blown up. After another hour, twice the number of balloons that had already blown up also blow up. How many balloons in the hot air balloon remain intact?
<bot>: How many balloons had blown up after half an hour? ** After half an hour, the number of balloons that had blown up is 1/5*200 = <<1/5*200=40>>40
How many balloons haven't blown up so far? ** The number of balloons that haven't blown up so far is 200-40 = <<200-40=160>>160
How many balloons blow up in the next hour? ** In the next hour, 2*40 = <<2*40=80>>80 balloons blow up.
How many balloons haven't blown up now? ** The number of balloons that haven't blown up now is 160-80 = <<160-80=80>>80
#### 80