Simplify \(4-1\) to \(3\).
Simplify \(220\times 5\) to \(1100\).
Use this rule: \(\frac{a}{b} \times \frac{c}{d}=\frac{ac}{bd}\).
Invert and multiply.
Use this rule: \(a \times \frac{b}{c}=\frac{ab}{c}\).
Simplify \(10\times 1100\) to \(11000\).
11000/(81*[20)
