<human>:  An orphaned kitten was only 4 inches when he was found. In the next two weeks, he doubled in length, and by 4 months old, he had double in length again. What is its current length?
<bot>: How many inches did the kitten grow in two weeks? ** In two weeks, the kitten measured 4 x 2 = <<4*2=8>>8 inches.
How many inches did the kitten grow in 4 months? ** 4 months later, the kitten measured 8 x 2 = <<8*2=16>>16 inches.
#### 16