how to turn 23245^-1/3 into a decimal
$${{\mathtt{23\,245}}}^{{\mathtt{\,-\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{3}}}}\right)} = {\mathtt{0.035\: \!039\: \!412\: \!554\: \!852\: \!7}}$$
You just do it straight on a calculator.