# How do you multiply 3 / (2 sqrt2) ?

$\frac{3}{2 \sqrt{2}} \cdot \frac{\sqrt{2}}{\sqrt{2}} = \textcolor{b l u e}{\frac{3 \sqrt{2}}{4}}$
All I did was multiply using the same radical you see in the denominator of the original fraction as a ratio that equals $1$.