6) 14 * 7/8

6) $$ 14 \cdot \frac{7}{8} = \frac{14 \cdot 7}{8} = \frac{2 \cdot 7 \cdot 7}{2 \cdot 4} = \frac{49}{4} = 12\frac{1}{4} $$

Ответ: $$12\frac{1}{4}$$