Colorful calculator

2screensandsimpleoperability.Therearemorethan200colorsanddesigns.Thiscalculatorcandotwocalculationsatthetopandbottom.Emphasisonsimplicityandeaseofuse.(Exampleofusingatwo-screencalculator)Whenyouwanttocompare.Whencalculatingonceandthenrecalculatingforconfirmation.Whensavingnumericalvaluesandrecallingthemlater.