# How do you simplify 216^(2/3)?

Noticing that $216 = {6}^{3}$ and using ${\left({x}^{a}\right)}^{b} = {x}^{a b}$
${216}^{\frac{2}{3}} = {\left({6}^{3}\right)}^{\frac{2}{3}} = {6}^{3 \cdot \frac{2}{3}} = {6}^{2} = 36$