\[12\times \frac{4}{8}\]

1
Use this rule: a×bc=abca \times \frac{b}{c}=\frac{ab}{c}.
12×48\frac{12\times 4}{8}

2
Simplify  12×412\times 4  to  4848.
488\frac{48}{8}

3
Simplify.
66

Done

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