button,#ans,#clear,#back{height:60px;width:140px;border-radius:8px;font-weight:Bold;color:black;background-color:#4CAF50;}
#tab{height:400px;width:200;font-weight:Bold;color:blue;border-radius:16px;border-radius:8px;margin:20px;}
tr,td{height:10px;width:50px;border-radius:8px;font-family:Arial;font-size:30px;font-weight:Bold;color:black;}
#inp{width:750px;height:80px;border-radius:8px;font-weight:Bold;color:black;font-size:50px;}
button:hover{
box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2), 0 6px 20px 0 rgba(0,0,0,0.19);}
table{border-style:solid;background-color:#DCDCDC;}
#inp{background-color:white;}
li{font-size:20px;}
 td{border-style:solid ;}