\sqrt[3]{108} : \sqrt[3]4 = \sqrt[3]{108 : 4} = \sqrt[3]{27} = 3
\sqrt[3]{\frac{3}{4}} * \sqrt[3]{\frac{9}{2}}=\sqrt[3]{\frac{3}{4} * \frac{9}{2}} = \sqrt[3]{\frac{27}{8}} = \frac{3}{2} = 1,5
\sqrt[3]{\frac{9}{25}} : \sqrt[3]{\frac{5}{3}} = \sqrt[3]{\frac{9}{25}*\frac{3}{5}} = \sqrt[3]{\frac{27}{125}}=\frac{3}{5}
\sqrt[3]{0,002} * \sqrt[3]4 = \sqrt[3]{0,008} = 0,2
\sqrt[3]{0,32} * \sqrt[3]{0,2} = \sqrt[3]{0,32 * 0,2} = \sqrt[3]{0,064} = 0,4