Answer: 101.46 ounces in 3 liters
Explanation:
To do this problem in the easiest way, you take your half liter and double your answer to make it one liter.
16.91 x 2= 33.82 ( 1 liter)
Now since you have one liter and you need 3 liters, all you do is triple your last answer to get 3 liters.
33.82 x 3= 101.46 ( 3 liters)