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

### Instruction:
The last time Bob cut his hair he cut it to 6 inches.  His hair is now 36 inches long.  If hair grows at a rate of .5 inches per month how many years did it take him to grow out his hair?

### Response:
 Nywele zake zilikua inchi 36 - inchi 6 = <<36-6=30>>30.
Nywele hukua kwa kasi ya miezi 12/mwaka * inchi 0.5/mwezi = 6 inchi/mwaka.
Alitumia inchi 30 / inchi 6/mwaka = <<30/6=5>>5 miaka kuzikua nywele zake.