Zachary is planning to be out of town for the day, so he asks a friend to dog-sit his 3 dogs. Each dog eats 0.5 pounds of food every day. If dog food is sold in 12-ounce cans, how many cans should Zachary leave for the time he is away?
Hint: There are 16 ounces in 1 pound.
Write your answer as a whole number, decimal, or simplified fraction. Do not round