The answer to your problem is 1/2!
398,422 = 390,000
I wrote how to do it on another one of your questions. :)
The wording is a bit strange but I can tell you a ton is 2,000 pounds. 10,500 pounds would be equal to 5.25 tons.
That answer is 42 because it asks for the surface so you will multiply 6 by 6
