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The expression $\var{num}\div \var{den}$ is one number divided by another. We can get the same answer by doing $\var{num}$ multiplied by what number?
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$\var{num}\div \var{den}=\var{num}\times\frac{1}{\var{den}}$.
For example, dividing a number by 2 is the same as multiplying that number by a half.
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