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?
It took 8*.25=<T>multiply(8, 0.25)=2.0 years longer to go from chief to master chief than to get chief
So it takes him 8+2=<T>add(8, 2)=10 years to become a master chief
That means he took 10+8=<T>add(10, 8)=18 years to reach master chief from enlisting
So he was in the military for 18+10=<T>add(18, 10)=28 years
So he was 28+18=<T>add(28, 18)=46 when he retired
