First turn 18% to a decimal, which is .18, then multiply it by 450.
450 x .18 = 81
In terms of land area : Brazil
You see how much the scale is, let's say that it is 150 mm=300 miles. If it goes over, you can measure it with a ruler, or move with your hands, measuring it as well as possible and estimating. Hope this helps! :)
