* {
    font-family: Helvetica, Arial, sans-serif;
    text-align: center;
  }
  button {
    background-color: rgb(43, 82, 79);
    border-radius: 6px;
    border: none;
    color: rgb(255, 255, 255);
    padding: 10px;
    text-transform: uppercase;
    width: 200px;
    cursor: pointer;
  }
  #number{
    height: 100px;
    width: 100px;
    padding: 50px;
    margin: 50px auto;
    border: 1px solid gray;
    border-radius: 10px;  
    font-size:80px;
  }