As firefighters, Doug, Kai, and Eli have been putting out a lot of fires over the week. Doug has put out 20 fires for the week and Kai has put out 3 times more than Doug. Meanwhile, Eli has put out half the number of fires Kai was able to. How many fires have they put out for the entire week?
Kai has put out 20 x 3 = <<20*3=60>>60 fires for the week.
Eli has put out 60 / 2 = <<60/2=30>>30 fires for the week.
Therefore, the total amount of fires they have put out over the entire week was 20 + 60 + 30 = <<20+60+30=110>>110.
#### 110