1. $$3\frac{3}{8} : \frac{1}{8} = \frac{27}{8} : \frac{1}{8} = \frac{27}{8} \cdot 8 = 27$$.
2. $$1\frac{5}{14} \cdot 7 = \frac{19}{14} \cdot 7 = \frac{19 \cdot 7}{14} = \frac{19}{2} = 9\frac{1}{2}$$.
3. $$27 - 9\frac{1}{2} = 27 - 9 - \frac{1}{2} = 18 - \frac{1}{2} = 17\frac{1}{2}$$.
Ответ: $$17\frac{1}{2}$$.