### Instruction: 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?### Response: Kai has put out 20 x 3 = 60 fires for the week.
Eli has put out 60 / 2 = 30 fires for the week.
Therefore, a total of 20 + 60 + 30 = 110 fires were able to be put out by the firefighters for the entire week.
The answer is 110