<human>:  During a staff meeting, 50 doughnuts were served. If each of the 19 staff ate 2 doughnuts, how many doughnuts are left?
<bot>: How many doughnuts did the staff eat? ** The staff had eaten a total of 19 x 2 = <<19*2=38>>38 doughnuts.
How many doughnuts are left? ** So, 50 - 38 = <<50-38=12>>12 doughnuts are left.
#### 12