It takes 2/5 of a gallon of paint to paint one doghouse . How many dog houses can you paint with 4 gallons of paint? Please make sure to EXPLAIN (either with a voice recording or with typed text)!

8/5 gallons of paint.

Explanation:

Ok, you need 2/5 gallons of paint to paint a dog house.

Then if you need to paint 4 dog houses, then you need 4 times the 2/5 gallons of paint.

This is equal to:

4*(2/5 gallons) = (4*2)/5 gallons = 8/5 gallons

Then you need 8/5 gallons of paint to paint 4 dog houses.

because he is a great ruler