Решение:
\[ 2\frac{1}{6} = \frac{2 \times 6 + 1}{6} = \frac{12 + 1}{6} = \frac{13}{6} \]
\[ \frac{13}{6} \times \frac{6}{7} = \frac{13 \times 6}{6 \times 7} \]
\[ \frac{13 \times 6}{6 \times 7} = \frac{13}{7} \]
\[ \frac{13}{7} = 13 \div 7 = 1 \text{ (остаток } 6) = 1\frac{6}{7} \]
Ответ: 1&frac67;