[tex]\bf \cfrac{\frac{a}{b}}{\frac{c}{{{ d}}}}\implies \cfrac{a}{b}\cdot \cfrac{{{ d}}}{c}\\\\
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\cfrac{2}{3}\div \cfrac{1}{6}\implies \cfrac{\frac{2}{3}}{\frac{1}{6}}\implies \cfrac{2}{3}\cdot \cfrac{6}{1}\implies \cfrac{2\cdot 6}{3\cdot 1}\implies \cfrac{12}{3}\implies \cfrac{4}{1}\implies 4[/tex]
