Evaluate $\frac{1}{9}\times\frac{2}{5}$19×25.

Evaluate $\frac{1}{5}\times\frac{4}{12}$15×412.

Evaluate $\frac{4}{11}\times\frac{1}{10}$411×110.

What is $\frac{8}{11}$811 of $\frac{4}{5}$45?