6 X 1900 ml = _____________ l

(            )  x  2.3 l   =  $\ \ 25\frac{3}{10}\ l$  

12 x 11.96升 = __________________毫升

100 x  $21\frac{9}{10}\ ml\ =\ _{\ \ \ \ \ \ \ \ }\ \ \ \ \ \ \ \ l$  

 $235.1\ \ \ l\ \div\ 100\ =\ \ \ \ \ \ \ \ \ l$  

 $7.14\ \ \ l\ \div\ 14\ =\ \ \ \ \ \ \ \ \ l$  

 $545\ \ l\ \div\ 1000\ =\ \ \ \ \ \ \ \ \ ml$  

 $64\frac{2}{5}\ l\div\ 4=\ \ \ \ \ \ \ \ \ l$  

 $72\frac{1}{2}\ l\div\ 10=\ \ \ \ \ \ \ \ \ ml$