###Human: There are chickens roaming the chicken farm. The roosters outnumber the hens 2 to 1. If there are 9,000 chickens on the chicken farm, how many roosters are there?, ### Assistant: There are 9000/(2+1)=3000 hens on the farm.
There are 3000*2=6000 roosters on the farm. 
 So the answer is :  6000