Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
James wants to build a ladder to climb a very tall tree.  Each rung of the ladder is 18 inches long and they are 6 inches apart.  If he needs to climb 50 feet how many feet of wood will he need for the rungs?

### Response:
The rungs are 12/6=<<12/6=2>>2 feet apart
So he needs 50*2=<<50*2=100>>100 rungs
That means he needs 100*18=<<100*18=1800>>1800 inches of wood
That is 1800/12=<<1800/12=150>>150 feet
#### 150