12) 22/3 * 18/11 / 4/7

1. Convert division to multiplication by the reciprocal: (22/3) * (18/11) * (7/4).

2. Multiply the numerators and denominators: (22 * 18 * 7) / (3 * 11 * 4).

3. Simplify the expression: (2772) / (132) = 21.