Answer
18
Work Step by Step
4$\frac{1}{2}$$\div$$\frac{1}{4}$
$\frac{9}{2}$$\div$$\frac{1}{4}$
$\frac{9}{2}$$\times$$\frac{4}{1}$
$\frac{9\times4}{2\times1}$
18
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