1mm=0.01分米6.5x3x2.5=48.75立方分米＝48.75升
650亳米=0.650米300亳米=0.300米250亳米=0.250米0.650×0.300×0.250=0.04875（立方米）=48.75（升）答：容积是48.75升
1升=1立方分米把单位化成分米再计算，结果就是立方分米，即升。V=6.5*3*2.5=48.75升
