4.78*2.5的积再*0.4

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4.78*2.5的积再*0.44.78*2.5的积再*0.44.78*2.5的积再*0.44.78*2.5*0.4=2.5*0.4*4.78=1*4.78=4.78

4.78*2.5的积再*0.4
4.78*2.5的积再*0.4

4.78*2.5的积再*0.4
4.78*2.5*0.4=2.5*0.4*4.78=1*4.78=4.78