(-5)乘8乘(-7)乘(-0.250

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(-5)乘8乘(-7)乘(-0.250
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(-5)乘8乘(-7)乘(-0.250
(-5)乘8乘(-7)乘(-0.250

(-5)乘8乘(-7)乘(-0.250
-70
-5*8=-40
-40*-7=280
280*-0.25=-70