<human>:  A farmer has 51 cows. The farmer adds five new cows to its herd and then sells a quarter of the herd. How many cows does the farmer have left?
<bot>: How many cows does the farmer have after adding the new cows? ** The farmer has 51+5 = <<51+5=56>>56 cows in its herd.
How many cows does the farmer sell? ** The farmer sells 56/4 = <<56/4=14>>14 cows of the herd.
How many cows does the farmer have left? ** The farmer now has 56-14 = <<56-14=42>>42 cows.
#### 42