Multiply :

3 $\times$  0.6 = 

$5.36\times 3.6=?$

$\frac{17.28÷?}{3.6\times 0.2}=200$

Simplify: $\frac{0.5\times 0.5\times 0.5+0.6\times 0.6\times 0.6}{0.5\times 0.5-0.5\times 0.6+0.6\times 0.6}=?$