Answer: 108 kilometers
Step-by-step explanation: If he travels 9 kilometers in 5 days you can simply do 5 times 12 which equals 60. Then, you do 9 times 12 because you did it with the 5. So, 9 times 12 is 108.
Another way: You can find unit rate first. You can do 9/5 to find how many kilometers he travels per day. After you divide you get 1.8 kilometers per day. But, he travels for 60 days. So, you do 1.8 times 60, which simply equals 108.