Выполни умножение

1. \(2\cfrac{6}{7}\cdot2\cfrac{4}{5}=\) [ ];

2. \(2\cfrac{3}{8}\cdot1\cfrac{13}{19}=\) [ ];

3. \(5\cfrac{1}{16}\cdot1\cfrac{11}{45}=\) [ ];

4. \(2\cfrac{1}{3}\cdot1\cfrac{3}{14}=\) [ ].