(2.63+3/8)*(25+2/5)*(2.37-3/8)*(25+2/5)

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(2.63+3/8)*(25+2/5)*(2.37-3/8)*(25+2/5)(2.63+3/8)*(25+2/5)*(2.37-3/8)*(25+2/5)(2.63+3/8)*(25+2/5)*(2

(2.63+3/8)*(25+2/5)*(2.37-3/8)*(25+2/5)
(2.63+3/8)*(25+2/5)*(2.37-3/8)*(25+2/5)

(2.63+3/8)*(25+2/5)*(2.37-3/8)*(25+2/5)
中间是加号吧
(2.63+3/8)*(25+2/5)+(2.37-3/8)*(25+2/5)
=(2.63+2.37+3/8-3/8)(25+2/5)
=5x(25+2/5)
=5x25+5x2/5
=125+2
=127