3.25÷0.25÷0.4= 3.25 ÷（0.25 ×0.4）= 3.25 ÷ 0.1= 32.5
3.25/（0.25×0.4）=32.5
3.25/(0.25*0.4)=3.25/0.1=32.5
3.25÷（0.25*0.4）
