Evaluate the following 
 
1. \(10\) \(\div\) \(\frac{1}{15}\) \(=\) i
 
2. \(\frac{6}{7}\) \(\div\) \(2\) \(=\) ii
 
3. \(\frac{10}{15}\) \(\div\) \(\frac{10}{15}\)\(=\)
 
4. \(\frac{6}{7}\) \(\div\) \(\frac{7}{6}\)\(=\)  ii
 
[NOTE : With Simplification]