<human>:  Jamie is a firefighter. One day an emergency call comes in from Mrs. Thompson, an elderly woman whose cat can't get down a 20-foot tree. The last time Jamie rescued a cat, he got it down from a 6-foot tree and had to climb 12 rungs of his ladder. How many rungs does he have to climb this time to get the cat down from the tree?
<bot>: How many rungs did Jamie climb to save the first cat? ** Jamie needed 12/6 = <<12/6=2>>2 rungs per foot of the tree to save the first cat.
How many rungs does Jamie need to climb this time? ** To climb a 20-foot tree, Jamie needs 20*2 = <<20*2=40>>40 rungs
#### 40