-
9999*0.78+3333*0.66
=9999*0.78+3333*3*0.22
=9999*0.78+9999*0.22
=9999*(0.78+0.22)
=9999*1
=9999
9999*0.78+3333*0.66
=3333*3*0.78+3333*0.66
=3333*2.34+3333*0.66
=3333*(2.34+0.66)
=3333*3
=9999
-
9999*0.78+3333*0.66
=3*3333*0.78+3333*0.66
=3333*（3*0.78+0.66）
=3333*（2.34+0.66）
=3333*3
=9999
9999*0.78+3333*0.66
=9999*0.78+3333*0.22*3
=9999*0.78+9999*0.22
=9999*(0.78+0.22)
=9999*1
=9999
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