<prompt> Kujenga calculator kutumia HTML na JavaScript.  <response>: Heres an example of how you could build a calculator using HTML, JavaScript and a bit of CSS for styling: HTML:html Calculator 0ACCE789456x123-0. CSS:cssBasic styling for the calculator calculator width: 320px; height:500px; margin:50px auto; padding:5px; background-color:EEE; text-align: center;display height:70px; width:314px; margin:0 auto; background-color:444; color:ffe600; font-size: 26px; line-height: 70px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;button width:157px; 