From Förberedande kurs i matematik 1

Individually, \displaystyle 3^{1\textrm{.}4} and \displaystyle 3^{0\textrm{.}6} are difficult to calculate, but when multiplied together

\displaystyle 3^{1\textrm{.}4}\cdot 3^{0\textrm{.}6} = 3^{1\textrm{.}4+0\textrm{.}6} = 3^{2} = 3\cdot 3 = 9

on using the power rules.