2) 63.111.

2) $$6\frac{3}{4} \cdot 1\frac{11}{45} = \frac{6 \cdot 4 + 3}{4} \cdot \frac{1 \cdot 45 + 11}{45} = \frac{27}{4} \cdot \frac{56}{45} = \frac{27 \cdot 56}{4 \cdot 45} = \frac{1512}{180} = \frac{42}{5} = 8\frac{2}{5}$$

Ответ: $$8\frac{2}{5}$$