Answer
The total area is about $66,000\ mi^2$.
Work Step by Step
Plug the values into this equation, where b is one value, p is the percent, expressed as a decimal, and a is p percent of b.
$a=p\%\times b$ substitute
$11,800=0.18\times b$ divide both sides by 0.18
$11,800\div0.18=0.18b\div0.18$ simplify
$65,555.\overline5=b$
