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L=19X2/3=38/3,S1=(8十38/3>x8÷2=32+152/3,S

L=19X2/3=38/3,S1=(8十38/3>x8÷2=32+152/3,S2=38/3x16÷2=304/3,合=32+456/3=32十152=184,也不难!