$\displaystyle\frac{{{200}\ \text{ yards}}}{{1}}\cdot\frac{{{3}\ \text{ foot}}}{{{1}\ \text{ yard}}}={600}\ \text{ feet}\usepackage{cmbright}\Huge\$ .

To find the perimeter of a rectangle, you can use the formula:

$\displaystyle\text{perimeter}=\text{length}+\text{length}+\text{width}+\text{width}.\usepackage{cmbright}\Huge\$

$\displaystyle{600}\ \text{ feet}+{600}\ \text{ feet}+{300}\ \text{ feet}+{300}\ \text{ feet}={1},{800}\ \text{ feet}.\usepackage{cmbright}\Huge\$