I'll give you a question, please answer with step-by-step reasoning process.
A cup of dog food weighs 1/4 of a pound. If Mike has 2 dogs that each eat 6 cups of dog food twice a day how many 20 pound bags of dog food does he need to buy a month?

9
Each dog eats 6 * 2 = 12 cups of food a day.

His two dogs eat 12 * 2 = 24 cups a day.

Thus they eat 24 / 4 = 6 pounds a day.

So they eat 6 * 30 = 180 pounds a month.

So he needs to buy 180 / 20 = 9 bags of food.

.

The final answer: 9