6.25*1.02=(6+0.25)*(1+.0.02)=6+0.12+0.25+0.005=6.375
6.25*1.02=6.25*(1+0.02)=6.25*1+6.25*0.02=6.375
6.25×1.02=6.25×(1+0.02)=6.25+6.25×0.02=6.25+0.0125=6.2625
=6.25*(1+0.02)=6.25*1+6.25*0.02=6.375