Eating, Diet, & Nutrition for Constipation. How can your diet help prevent and relieve constipation? You can drink water and other fluids, such as fruit and vegetable juices and clear soups, to help the fiber in your diet work better. This change should make your stools more normal and regular.
Since there is $\frac{1}{3}$ of a cup of oatmeal in a serving, this means that each of the four cups contains 3 servings. This particular solution method reveals how dividing a whole number by a unit fraction is the same as multiplying that whole number by the reciprocal of the unit fraction.
I made 2 servings of oatmeal each day for 10 days and it takes about 10-15 minutes each time. No complaints it arrived as advertised, though I've found out that I can get them as little as $1.50 a can locally at some of the Asian markets in Chinatown NYC, good for me, but perhaps not so easy to find in your area.