Calculator using Vue 3

Hi Allan, nice job completing the challenge and it being useable! For the small buttons, grid-template-columns: repeat(4, 1fr) and grid-template-rows: repeat(4, 1fr) would have made a 4 by 4 grid then the big buttons at the bottom could have been grid-template-columns: repeat: (2, 1fr). Also the buttons should be button elements rather than div elements, I can't use the accessibility capabilities that buttons have like keyboard accessibility. Anyway three components could be made here to organize it: Button, Display, and RangeInput. Putting the CSS with those components into seperate files would be easier to read through the code and to create better names for the CSS rather than for1, for2, for3 or div1, div2, div3. Material UI has a variant property prop to change the buttons styles like 'primary' or 'secondary'.