We know that there are 3 boxes of detergent that are all 5.2 oz. To find out how many oz you have all together, you need to multiply 3 by 5.2 This comes out to 15.6
Now, you need to divide 15.6 by 0.7 This comes out to 22.2857143... and on and on, but it asks how many full loads can be cleaned. You can only do 22 full loads with three boxes of detergent. (:
Answer: 22 full loads
Hope this helps, and feel free to ask more questions if you need!! (: