设大数为贺绝X,小数为1000-1-X=999-X,X+(999-X)/1000=6(999-X+X/1000),解方或拍唯程可衫培得X=857则大数为857,小数位142
不防设x>yx+y+1=1000x+y*0.001=6(y+x*0.001)x=857,y=142