41.2*10-41.2*1.9+11*1.25+53.7*1.9=412+12.5*1.9+11*1.25=412+12.5*1.9+12.5+1.25=412+12.5*2-1.25+12.5-1.25=412+25+12.5=437+12.5=449.5
你的串号我已经记下，采纳后我会帮你制作
