Ответ:
\[2\frac{3}{8} \cdot \frac{3}{14} + \frac{11}{14} \cdot 2\frac{3}{8} =\]
\[= 2\frac{3}{8} \cdot \left( \frac{3}{14} + \frac{11}{14} \right) = 2\frac{3}{8} \cdot \frac{14}{14} =\]
\[= 2\frac{3}{8} \cdot 1 = 2\frac{3}{8}.\]
\[2\frac{3}{8} \cdot \frac{3}{14} + \frac{11}{14} \cdot 2\frac{3}{8} =\]
\[= 2\frac{3}{8} \cdot \left( \frac{3}{14} + \frac{11}{14} \right) = 2\frac{3}{8} \cdot \frac{14}{14} =\]
\[= 2\frac{3}{8} \cdot 1 = 2\frac{3}{8}.\]