6561 | 3
2187 | 3
729 | 3
243 | 3
81 | 3
27 | 3
9 | 3
3 | 3
1 | 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 = 3⁸
[tex]\sqrt{6561}[/tex] = [tex]\sqrt{3^8}[/tex] = [tex]3^{\frac{8}{2}}[/tex] = [tex]3^{4}[/tex] = 3 x 3 x 3 x 3 = 81