Calculate：$$\frac{1}{2}\times \frac{22}{7}\div \frac{11}{5}$$． 
Overseas Competition->Knowledge Point->Calculation Modules->Fractions->Operations of Fractions
$$\frac{1}{2}\times \frac{22}{7}\div \frac{11}{5}=\frac{1}{2}\times \frac{22}{7}\times \frac{5}{11}=\frac{5}{7}$$. 