Упростите выражение: 3 1/6*c*7/19*d.

\[3\frac{1}{6}c \cdot \frac{7}{19}d = \frac{19 \cdot 7}{6 \cdot 19}cd = \frac{7}{6}cd =\]

\[= 1\frac{1}{6}\text{cd}\]