<human>:  On a farm, on average every 6 cows produce 108 liters of milk per week. In five weeks the cows produced 2160 liters of milk. How many cows are on the farm?
<bot>: How many liters does each cow produce per week? ** Per week, one cow produces 108 liters / 6 cows = <<108/6=18>>18 liters/cow.
How many cows are on the farm? ** The cows produced 2160 liters of milk over 5 weeks. So we have 2160 liters / 18 liters/cow = <<2160/18=120>>120 cows.
How many cows are on the farm? ** Further, we have to divide 120 cows / 5 weeks = <<120/5=24>>24 cows.
#### 24