2.25*0.16+264*0.0225+5.2*2.25+0.225*20=

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2.25*0.16+264*0.0225+5.2*2.25+0.225*20=
2.25*0.16+264*0.0225+5.2*2.25+0.225*20=

2.25*0.16+264*0.0225+5.2*2.25+0.225*20=
2.25×0.16+264×0.0225+5.2×2.25+0.225×20
=2.25×0.16+2.25x2.64+5.2×2.25+2.25×2
=2.25x(0.16+2.64+5.2+2)
=2.25x(2.8+5.2+2)
=2.25x10
=22.5

2.25*0.16+2.64*2.25+5.2*2.25+2.25*2=2.25*(0.16+2.64+5.2+2)=2.25*10=22.5