Snowstorm (Use the number line to solve word problems involving addition, subtraction, and multiplication of measurements expressed in whole numbers and requiring conversion of larger units to smaller units)

The school has been closed for the last 3 days due to a harsh snowstorm. During those 3 days the average snowfall was 9 inches per day. What is the total snowfall for these days? How does this total compare to the snowstorm of last year which had a total snowfall of 2 feet?