It took 8*.25=<<8*.25=2>>2 years longer to go from chief to master chief than to get chief

So it takes him 8+2=<<8+2=10>>10 years to become a master chief

That means he took 10+8=<<10+8=18>>18 years to reach master chief from enlisting

So he was in the military for 18+10=<<18+10=28>>28 years

So he was 28+18=<<28+18=46>>46 when he retired

# Answer

46
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Jason joined the military when he turned 18.  It took him 8 years to raise to the rank of chief.  Then 25% longer than that to go from chief to master chief.  He then spent 10 years more in the military before retiring.  How old was he when he retired?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
46
Jason joined the military when he turned 18.  It took him 8 years to raise to the rank of chief.  Then 25% longer than that to go from chief to master chief.  He then spent 10 years more in the military before retiring.  How old was he when he retired?
train