计算，能简算的要简算．
18×5.46+1.8×4.54=　   　；          0.32×0.25×12.5=　   　；       21÷0.25÷0.4=　   　；
02×9.9+0.1=　   　；                  0.25×4.78×4=　   　；           3.2×10.2=　   　．