My daughter has not really learned about square roots yet. How can I explain how to find the scale on this question in a simple way? Thank you

Given:
The area of the Mojave desert is 25000 square miles.
Scale of the map is:
25000 square miles on soil = 10 square inches on map
[tex]25000\text{squaremiles = }10^{14}\text{ square inche }[/tex][tex]10^{14}\text{ square inches on soil }=10\text{ square inches on map}[/tex][tex]10^{13}\text{ square inches on soil =1 square inches on map}[/tex][tex]1\colon10^{13}\text{ is the scale}[/tex]