1) $$rac{16}{3} \times \frac{9}{4}$$

$$\frac{16}{3} \times \frac{9}{4} = \frac{16 \times 9}{3 \times 4} = \frac{4 \times 4 \times 3 \times 3}{3 \times 4} = 4 \times 3 = 12$$

Ответ: 12