If I need 2 cups of flour but only have a 1/6 measuring cup how many times will I need to fill the measuring cup

We need to determine how many times 1/6 of a cup can be fitted in 2 cups. For this, we need to calculate:
[tex]\frac{2}{\frac{1}{6}}=\frac{\frac{2}{1}}{\frac{1}{6}}=\frac{6\cdot2}{1\cdot1}=12[/tex]Where we used the 'sandwich' rule
[tex]\frac{\frac{a}{b}}{\frac{c}{d}}=\frac{a\cdot d}{b\cdot c}[/tex]Then, the answer is 12